diff --git a/src/Data/Time/Clock/TAI/Compat.hs b/src/Data/Time/Clock/TAI/Compat.hs
--- a/src/Data/Time/Clock/TAI/Compat.hs
+++ b/src/Data/Time/Clock/TAI/Compat.hs
@@ -5,10 +5,14 @@
     taiNominalDayStart,
 
     -- * leap-second map type
-    LeapSecondMap',
+    LeapSecondMap,
 
     -- * conversion between UTC and TAI with map
+#if MIN_VERSION_time(1,7,0)
+    T.utcDayLength,T.utcToTAITime,T.taiToUTCTime,
+#else
     utcDayLength,utcToTAITime,taiToUTCTime,
+#endif
 
     taiClock,
     ) where
@@ -16,14 +20,42 @@
 import Data.Time.Orphans ()
 
 import Data.Time.Compat
-import Data.Time.Clock.TAI
+import Data.Time.Clock.TAI hiding (utcDayLength,utcToTAITime,taiToUTCTime)
+import qualified Data.Time.Clock.TAI as T
 
+import Data.Fixed (div')
+
 -- | This type is either 'LeapSecondMap' or 'LeapSecondTable', depending
 -- on the version of @time@ (changed in @time-1.7.0@).
-#if MIN_VERSION_time(1,7,0)
-type LeapSecondMap' = LeapSecondMap
-#else
-type LeapSecondMap' = LeapSecondTable
+#if !(MIN_VERSION_time(1,7,0))
+type LeapSecondMap = Day -> Maybe Int
+
+utcDayLength :: LeapSecondMap -> Day -> Maybe DiffTime
+utcDayLength lsmap day = do
+    i0 <- lsmap day
+    i1 <- lsmap $ addDays 1 day
+    return $ realToFrac (86400 + i1 - i0)
+
+dayStart :: LeapSecondMap -> Day -> Maybe AbsoluteTime
+dayStart lsmap day = do
+    i <- lsmap day
+    return $ addAbsoluteTime (realToFrac $ (toModifiedJulianDay day) * 86400 + toInteger i) taiEpoch
+
+utcToTAITime :: LeapSecondMap -> UTCTime -> Maybe AbsoluteTime
+utcToTAITime lsmap (UTCTime day dtime) = do
+    t <- dayStart lsmap day
+    return $ addAbsoluteTime dtime t
+
+taiToUTCTime :: LeapSecondMap -> AbsoluteTime -> Maybe UTCTime
+taiToUTCTime lsmap abstime = let
+    stable day = do
+        dayt <- dayStart lsmap day
+        len <- utcDayLength lsmap day
+        let
+            dtime = diffAbsoluteTime abstime dayt
+            day' = addDays (div' dtime len) day
+        if day == day' then return (UTCTime day dtime) else stable day'
+    in stable $ ModifiedJulianDay $ div' (diffAbsoluteTime abstime taiEpoch) 86400
 #endif
 
 #if !(MIN_VERSION_time(1,8,0))
diff --git a/src/Data/Time/Orphans.hs b/src/Data/Time/Orphans.hs
--- a/src/Data/Time/Orphans.hs
+++ b/src/Data/Time/Orphans.hs
@@ -49,4 +49,10 @@
 
 instance FormatTime UniversalTime where
     formatCharacter c = fmap (\f tl fo t -> f tl fo (ut1ToLocalTime 0 t)) (formatCharacter c)
+
+instance Show UniversalTime where
+    show t = show (ut1ToLocalTime 0 t)
+
+instance Read UniversalTime where
+    readsPrec n s = [ (localTimeToUT1 0 t, r) | (t,r) <- readsPrec n s ]
 #endif
diff --git a/test/main/Main.hs b/test/main/Main.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Main.hs
@@ -0,0 +1,63 @@
+module Main where
+
+import Test.Tasty
+import Test.Calendar.AddDays
+import Test.Calendar.Calendars
+import Test.Calendar.ClipDates
+import Test.Calendar.ConvertBack
+import Test.Calendar.Duration
+import Test.Calendar.Easter
+import Test.Calendar.LongWeekYears
+import Test.Calendar.MonthDay
+import Test.Calendar.Valid
+import Test.Calendar.Week
+import Test.Clock.Conversion
+import Test.Clock.Resolution
+import Test.Clock.TAI
+import Test.Format.Format
+import Test.Format.ParseTime
+import Test.Format.ISO8601
+import Test.LocalTime.Time
+import Test.LocalTime.TimeOfDay
+import Test.LocalTime.CalendarDiffTime
+
+
+tests :: TestTree
+tests = testGroup "Time" [
+    testGroup "Calendar" [
+        addDaysTest,
+        testCalendars,
+        clipDates,
+        convertBack,
+        longWeekYears,
+        testMonthDay,
+        testEaster,
+        testValid,
+        testWeek,
+        testDuration
+        ],
+    testGroup "Clock" [
+        testClockConversion,
+        testResolutions,
+        testTAI
+        ],
+    testGroup "Format" [
+        testFormat,
+        testParseTime,
+        testISO8601
+        ],
+    testGroup "LocalTime" [
+        testTime,
+        testTimeOfDay,
+        testCalendarDiffTime
+        ]
+    ]
+
+main :: IO ()
+main = 
+-- on older GHC we only compile
+#if __GLASGOW_HASKELL__ >=802
+    defaultMain tests
+#else
+    return ()
+#endif
diff --git a/test/main/Test/Arbitrary.hs b/test/main/Test/Arbitrary.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Arbitrary.hs
@@ -0,0 +1,108 @@
+{-# OPTIONS -fno-warn-orphans #-}
+
+module Test.Arbitrary where
+
+import Data.Time.Compat
+import Data.Time.Clock.POSIX.Compat
+
+import Control.Monad
+import Data.Ratio
+import Test.Tasty.QuickCheck hiding (reason)
+
+instance Arbitrary DayOfWeek where
+    arbitrary = fmap toEnum $ choose (1,7)
+
+instance Arbitrary Day where
+    arbitrary = liftM ModifiedJulianDay $ choose (-313698, 2973483) -- 1000-01-1 to 9999-12-31
+    shrink day = let
+        (y, m, d) = toGregorian day
+        dayShrink =
+            if d > 1
+                then [fromGregorian y m (d - 1)]
+                else []
+        monthShrink =
+            if m > 1
+                then [fromGregorian y (m - 1) d]
+                else []
+        yearShrink =
+            if y > 2000
+                then [fromGregorian (y - 1) m d]
+                else if y < 2000
+                         then [fromGregorian (y + 1) m d]
+                         else []
+        in dayShrink ++ monthShrink ++ yearShrink
+
+instance CoArbitrary Day where
+    coarbitrary (ModifiedJulianDay d) = coarbitrary d
+
+instance Arbitrary CalendarDiffDays where
+    arbitrary = liftM2 CalendarDiffDays arbitrary arbitrary
+
+instance Arbitrary DiffTime where
+    arbitrary = oneof [intSecs, fracSecs] -- up to 1 leap second
+      where
+        intSecs = liftM secondsToDiffTime' $ choose (0, 86400)
+        fracSecs = liftM picosecondsToDiffTime' $ choose (0, 86400 * 10 ^ (12 :: Int))
+        secondsToDiffTime' :: Integer -> DiffTime
+        secondsToDiffTime' = fromInteger
+        picosecondsToDiffTime' :: Integer -> DiffTime
+        picosecondsToDiffTime' x = fromRational (x % 10 ^ (12 :: Int))
+
+instance CoArbitrary DiffTime where
+    coarbitrary t = coarbitrary (fromEnum t)
+
+instance Arbitrary NominalDiffTime where
+    arbitrary = oneof [intSecs, fracSecs]
+      where
+        limit = 1000 * 86400
+        picofactor = 10 ^ (12 :: Int)
+        intSecs = liftM secondsToDiffTime' $ choose (negate limit, limit)
+        fracSecs = liftM picosecondsToDiffTime' $ choose (negate limit * picofactor, limit * picofactor)
+        secondsToDiffTime' :: Integer -> NominalDiffTime
+        secondsToDiffTime' = fromInteger
+        picosecondsToDiffTime' :: Integer -> NominalDiffTime
+        picosecondsToDiffTime' x = fromRational (x % 10 ^ (12 :: Int))
+
+instance CoArbitrary NominalDiffTime where
+    coarbitrary t = coarbitrary (fromEnum t)
+
+instance Arbitrary CalendarDiffTime where
+    arbitrary = liftM2 CalendarDiffTime arbitrary arbitrary
+
+instance Arbitrary TimeOfDay where
+    arbitrary = liftM timeToTimeOfDay arbitrary
+
+instance CoArbitrary TimeOfDay where
+    coarbitrary t = coarbitrary (timeOfDayToTime t)
+
+instance Arbitrary LocalTime where
+    arbitrary = liftM2 LocalTime arbitrary arbitrary
+
+instance CoArbitrary LocalTime where
+    coarbitrary t = coarbitrary (floor (utcTimeToPOSIXSeconds (localTimeToUTC utc t)) :: Integer)
+
+instance Arbitrary TimeZone where
+    arbitrary = liftM minutesToTimeZone $ choose (-720, 720)
+
+instance CoArbitrary TimeZone where
+    coarbitrary tz = coarbitrary (timeZoneMinutes tz)
+
+instance Arbitrary ZonedTime where
+    arbitrary = liftM2 ZonedTime arbitrary arbitrary
+
+instance CoArbitrary ZonedTime where
+    coarbitrary t = coarbitrary (floor (utcTimeToPOSIXSeconds (zonedTimeToUTC t)) :: Integer)
+
+instance Arbitrary UTCTime where
+    arbitrary = liftM2 UTCTime arbitrary arbitrary
+
+instance CoArbitrary UTCTime where
+    coarbitrary t = coarbitrary (floor (utcTimeToPOSIXSeconds t) :: Integer)
+
+instance Arbitrary UniversalTime where
+    arbitrary = liftM (\n -> ModJulianDate $ n % k) $ choose (-313698 * k, 2973483 * k) -- 1000-01-1 to 9999-12-31
+      where
+        k = 86400
+
+instance CoArbitrary UniversalTime where
+    coarbitrary (ModJulianDate d) = coarbitrary d
diff --git a/test/main/Test/Calendar/AddDays.hs b/test/main/Test/Calendar/AddDays.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/AddDays.hs
@@ -0,0 +1,43 @@
+module Test.Calendar.AddDays(addDaysTest) where
+
+import Data.Time.Calendar.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Calendar.AddDaysRef
+
+days ::[Day]
+days =
+    [
+    fromGregorian 2005 2 28,
+    fromGregorian 2004 2 29,
+    fromGregorian 2004 1 31,
+    fromGregorian 2004 12 31,
+    fromGregorian 2005 7 1,
+    fromGregorian 2005 4 21,
+    fromGregorian 2005 6 30
+    ]
+
+increments :: [Integer]
+increments = [-10,-4,-1,0,1,7,83]
+
+adders :: [(String,Integer -> Day -> Day)]
+adders =
+    [
+    ("day",addDays),
+    ("month (clip)",addGregorianMonthsClip),
+    ("month (roll over)",addGregorianMonthsRollOver),
+    ("year (clip)",addGregorianYearsClip),
+    ("year (roll over)",addGregorianYearsRollOver)
+    ]
+
+resultDays :: [String]
+resultDays = do
+    (aname,adder) <- adders
+    increment <- increments
+    day <- days
+    return ((showGregorian day) ++ " + " ++ (show increment) ++ " * " ++ aname ++ " = " ++ showGregorian (adder increment day))
+
+addDaysTest :: TestTree
+addDaysTest = testCase "addDays" $
+    assertEqual "" addDaysRef $ unlines resultDays
diff --git a/test/main/Test/Calendar/AddDaysRef.hs b/test/main/Test/Calendar/AddDaysRef.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/AddDaysRef.hs
@@ -0,0 +1,250 @@
+module Test.Calendar.AddDaysRef where
+
+addDaysRef :: String
+addDaysRef =
+ unlines
+  [ "2005-02-28 + -10 * day = 2005-02-18"
+  , "2004-02-29 + -10 * day = 2004-02-19"
+  , "2004-01-31 + -10 * day = 2004-01-21"
+  , "2004-12-31 + -10 * day = 2004-12-21"
+  , "2005-07-01 + -10 * day = 2005-06-21"
+  , "2005-04-21 + -10 * day = 2005-04-11"
+  , "2005-06-30 + -10 * day = 2005-06-20"
+  , "2005-02-28 + -4 * day = 2005-02-24"
+  , "2004-02-29 + -4 * day = 2004-02-25"
+  , "2004-01-31 + -4 * day = 2004-01-27"
+  , "2004-12-31 + -4 * day = 2004-12-27"
+  , "2005-07-01 + -4 * day = 2005-06-27"
+  , "2005-04-21 + -4 * day = 2005-04-17"
+  , "2005-06-30 + -4 * day = 2005-06-26"
+  , "2005-02-28 + -1 * day = 2005-02-27"
+  , "2004-02-29 + -1 * day = 2004-02-28"
+  , "2004-01-31 + -1 * day = 2004-01-30"
+  , "2004-12-31 + -1 * day = 2004-12-30"
+  , "2005-07-01 + -1 * day = 2005-06-30"
+  , "2005-04-21 + -1 * day = 2005-04-20"
+  , "2005-06-30 + -1 * day = 2005-06-29"
+  , "2005-02-28 + 0 * day = 2005-02-28"
+  , "2004-02-29 + 0 * day = 2004-02-29"
+  , "2004-01-31 + 0 * day = 2004-01-31"
+  , "2004-12-31 + 0 * day = 2004-12-31"
+  , "2005-07-01 + 0 * day = 2005-07-01"
+  , "2005-04-21 + 0 * day = 2005-04-21"
+  , "2005-06-30 + 0 * day = 2005-06-30"
+  , "2005-02-28 + 1 * day = 2005-03-01"
+  , "2004-02-29 + 1 * day = 2004-03-01"
+  , "2004-01-31 + 1 * day = 2004-02-01"
+  , "2004-12-31 + 1 * day = 2005-01-01"
+  , "2005-07-01 + 1 * day = 2005-07-02"
+  , "2005-04-21 + 1 * day = 2005-04-22"
+  , "2005-06-30 + 1 * day = 2005-07-01"
+  , "2005-02-28 + 7 * day = 2005-03-07"
+  , "2004-02-29 + 7 * day = 2004-03-07"
+  , "2004-01-31 + 7 * day = 2004-02-07"
+  , "2004-12-31 + 7 * day = 2005-01-07"
+  , "2005-07-01 + 7 * day = 2005-07-08"
+  , "2005-04-21 + 7 * day = 2005-04-28"
+  , "2005-06-30 + 7 * day = 2005-07-07"
+  , "2005-02-28 + 83 * day = 2005-05-22"
+  , "2004-02-29 + 83 * day = 2004-05-22"
+  , "2004-01-31 + 83 * day = 2004-04-23"
+  , "2004-12-31 + 83 * day = 2005-03-24"
+  , "2005-07-01 + 83 * day = 2005-09-22"
+  , "2005-04-21 + 83 * day = 2005-07-13"
+  , "2005-06-30 + 83 * day = 2005-09-21"
+  , "2005-02-28 + -10 * month (clip) = 2004-04-28"
+  , "2004-02-29 + -10 * month (clip) = 2003-04-29"
+  , "2004-01-31 + -10 * month (clip) = 2003-03-31"
+  , "2004-12-31 + -10 * month (clip) = 2004-02-29"
+  , "2005-07-01 + -10 * month (clip) = 2004-09-01"
+  , "2005-04-21 + -10 * month (clip) = 2004-06-21"
+  , "2005-06-30 + -10 * month (clip) = 2004-08-30"
+  , "2005-02-28 + -4 * month (clip) = 2004-10-28"
+  , "2004-02-29 + -4 * month (clip) = 2003-10-29"
+  , "2004-01-31 + -4 * month (clip) = 2003-09-30"
+  , "2004-12-31 + -4 * month (clip) = 2004-08-31"
+  , "2005-07-01 + -4 * month (clip) = 2005-03-01"
+  , "2005-04-21 + -4 * month (clip) = 2004-12-21"
+  , "2005-06-30 + -4 * month (clip) = 2005-02-28"
+  , "2005-02-28 + -1 * month (clip) = 2005-01-28"
+  , "2004-02-29 + -1 * month (clip) = 2004-01-29"
+  , "2004-01-31 + -1 * month (clip) = 2003-12-31"
+  , "2004-12-31 + -1 * month (clip) = 2004-11-30"
+  , "2005-07-01 + -1 * month (clip) = 2005-06-01"
+  , "2005-04-21 + -1 * month (clip) = 2005-03-21"
+  , "2005-06-30 + -1 * month (clip) = 2005-05-30"
+  , "2005-02-28 + 0 * month (clip) = 2005-02-28"
+  , "2004-02-29 + 0 * month (clip) = 2004-02-29"
+  , "2004-01-31 + 0 * month (clip) = 2004-01-31"
+  , "2004-12-31 + 0 * month (clip) = 2004-12-31"
+  , "2005-07-01 + 0 * month (clip) = 2005-07-01"
+  , "2005-04-21 + 0 * month (clip) = 2005-04-21"
+  , "2005-06-30 + 0 * month (clip) = 2005-06-30"
+  , "2005-02-28 + 1 * month (clip) = 2005-03-28"
+  , "2004-02-29 + 1 * month (clip) = 2004-03-29"
+  , "2004-01-31 + 1 * month (clip) = 2004-02-29"
+  , "2004-12-31 + 1 * month (clip) = 2005-01-31"
+  , "2005-07-01 + 1 * month (clip) = 2005-08-01"
+  , "2005-04-21 + 1 * month (clip) = 2005-05-21"
+  , "2005-06-30 + 1 * month (clip) = 2005-07-30"
+  , "2005-02-28 + 7 * month (clip) = 2005-09-28"
+  , "2004-02-29 + 7 * month (clip) = 2004-09-29"
+  , "2004-01-31 + 7 * month (clip) = 2004-08-31"
+  , "2004-12-31 + 7 * month (clip) = 2005-07-31"
+  , "2005-07-01 + 7 * month (clip) = 2006-02-01"
+  , "2005-04-21 + 7 * month (clip) = 2005-11-21"
+  , "2005-06-30 + 7 * month (clip) = 2006-01-30"
+  , "2005-02-28 + 83 * month (clip) = 2012-01-28"
+  , "2004-02-29 + 83 * month (clip) = 2011-01-29"
+  , "2004-01-31 + 83 * month (clip) = 2010-12-31"
+  , "2004-12-31 + 83 * month (clip) = 2011-11-30"
+  , "2005-07-01 + 83 * month (clip) = 2012-06-01"
+  , "2005-04-21 + 83 * month (clip) = 2012-03-21"
+  , "2005-06-30 + 83 * month (clip) = 2012-05-30"
+  , "2005-02-28 + -10 * month (roll over) = 2004-04-28"
+  , "2004-02-29 + -10 * month (roll over) = 2003-04-29"
+  , "2004-01-31 + -10 * month (roll over) = 2003-03-31"
+  , "2004-12-31 + -10 * month (roll over) = 2004-03-02"
+  , "2005-07-01 + -10 * month (roll over) = 2004-09-01"
+  , "2005-04-21 + -10 * month (roll over) = 2004-06-21"
+  , "2005-06-30 + -10 * month (roll over) = 2004-08-30"
+  , "2005-02-28 + -4 * month (roll over) = 2004-10-28"
+  , "2004-02-29 + -4 * month (roll over) = 2003-10-29"
+  , "2004-01-31 + -4 * month (roll over) = 2003-10-01"
+  , "2004-12-31 + -4 * month (roll over) = 2004-08-31"
+  , "2005-07-01 + -4 * month (roll over) = 2005-03-01"
+  , "2005-04-21 + -4 * month (roll over) = 2004-12-21"
+  , "2005-06-30 + -4 * month (roll over) = 2005-03-02"
+  , "2005-02-28 + -1 * month (roll over) = 2005-01-28"
+  , "2004-02-29 + -1 * month (roll over) = 2004-01-29"
+  , "2004-01-31 + -1 * month (roll over) = 2003-12-31"
+  , "2004-12-31 + -1 * month (roll over) = 2004-12-01"
+  , "2005-07-01 + -1 * month (roll over) = 2005-06-01"
+  , "2005-04-21 + -1 * month (roll over) = 2005-03-21"
+  , "2005-06-30 + -1 * month (roll over) = 2005-05-30"
+  , "2005-02-28 + 0 * month (roll over) = 2005-02-28"
+  , "2004-02-29 + 0 * month (roll over) = 2004-02-29"
+  , "2004-01-31 + 0 * month (roll over) = 2004-01-31"
+  , "2004-12-31 + 0 * month (roll over) = 2004-12-31"
+  , "2005-07-01 + 0 * month (roll over) = 2005-07-01"
+  , "2005-04-21 + 0 * month (roll over) = 2005-04-21"
+  , "2005-06-30 + 0 * month (roll over) = 2005-06-30"
+  , "2005-02-28 + 1 * month (roll over) = 2005-03-28"
+  , "2004-02-29 + 1 * month (roll over) = 2004-03-29"
+  , "2004-01-31 + 1 * month (roll over) = 2004-03-02"
+  , "2004-12-31 + 1 * month (roll over) = 2005-01-31"
+  , "2005-07-01 + 1 * month (roll over) = 2005-08-01"
+  , "2005-04-21 + 1 * month (roll over) = 2005-05-21"
+  , "2005-06-30 + 1 * month (roll over) = 2005-07-30"
+  , "2005-02-28 + 7 * month (roll over) = 2005-09-28"
+  , "2004-02-29 + 7 * month (roll over) = 2004-09-29"
+  , "2004-01-31 + 7 * month (roll over) = 2004-08-31"
+  , "2004-12-31 + 7 * month (roll over) = 2005-07-31"
+  , "2005-07-01 + 7 * month (roll over) = 2006-02-01"
+  , "2005-04-21 + 7 * month (roll over) = 2005-11-21"
+  , "2005-06-30 + 7 * month (roll over) = 2006-01-30"
+  , "2005-02-28 + 83 * month (roll over) = 2012-01-28"
+  , "2004-02-29 + 83 * month (roll over) = 2011-01-29"
+  , "2004-01-31 + 83 * month (roll over) = 2010-12-31"
+  , "2004-12-31 + 83 * month (roll over) = 2011-12-01"
+  , "2005-07-01 + 83 * month (roll over) = 2012-06-01"
+  , "2005-04-21 + 83 * month (roll over) = 2012-03-21"
+  , "2005-06-30 + 83 * month (roll over) = 2012-05-30"
+  , "2005-02-28 + -10 * year (clip) = 1995-02-28"
+  , "2004-02-29 + -10 * year (clip) = 1994-02-28"
+  , "2004-01-31 + -10 * year (clip) = 1994-01-31"
+  , "2004-12-31 + -10 * year (clip) = 1994-12-31"
+  , "2005-07-01 + -10 * year (clip) = 1995-07-01"
+  , "2005-04-21 + -10 * year (clip) = 1995-04-21"
+  , "2005-06-30 + -10 * year (clip) = 1995-06-30"
+  , "2005-02-28 + -4 * year (clip) = 2001-02-28"
+  , "2004-02-29 + -4 * year (clip) = 2000-02-29"
+  , "2004-01-31 + -4 * year (clip) = 2000-01-31"
+  , "2004-12-31 + -4 * year (clip) = 2000-12-31"
+  , "2005-07-01 + -4 * year (clip) = 2001-07-01"
+  , "2005-04-21 + -4 * year (clip) = 2001-04-21"
+  , "2005-06-30 + -4 * year (clip) = 2001-06-30"
+  , "2005-02-28 + -1 * year (clip) = 2004-02-28"
+  , "2004-02-29 + -1 * year (clip) = 2003-02-28"
+  , "2004-01-31 + -1 * year (clip) = 2003-01-31"
+  , "2004-12-31 + -1 * year (clip) = 2003-12-31"
+  , "2005-07-01 + -1 * year (clip) = 2004-07-01"
+  , "2005-04-21 + -1 * year (clip) = 2004-04-21"
+  , "2005-06-30 + -1 * year (clip) = 2004-06-30"
+  , "2005-02-28 + 0 * year (clip) = 2005-02-28"
+  , "2004-02-29 + 0 * year (clip) = 2004-02-29"
+  , "2004-01-31 + 0 * year (clip) = 2004-01-31"
+  , "2004-12-31 + 0 * year (clip) = 2004-12-31"
+  , "2005-07-01 + 0 * year (clip) = 2005-07-01"
+  , "2005-04-21 + 0 * year (clip) = 2005-04-21"
+  , "2005-06-30 + 0 * year (clip) = 2005-06-30"
+  , "2005-02-28 + 1 * year (clip) = 2006-02-28"
+  , "2004-02-29 + 1 * year (clip) = 2005-02-28"
+  , "2004-01-31 + 1 * year (clip) = 2005-01-31"
+  , "2004-12-31 + 1 * year (clip) = 2005-12-31"
+  , "2005-07-01 + 1 * year (clip) = 2006-07-01"
+  , "2005-04-21 + 1 * year (clip) = 2006-04-21"
+  , "2005-06-30 + 1 * year (clip) = 2006-06-30"
+  , "2005-02-28 + 7 * year (clip) = 2012-02-28"
+  , "2004-02-29 + 7 * year (clip) = 2011-02-28"
+  , "2004-01-31 + 7 * year (clip) = 2011-01-31"
+  , "2004-12-31 + 7 * year (clip) = 2011-12-31"
+  , "2005-07-01 + 7 * year (clip) = 2012-07-01"
+  , "2005-04-21 + 7 * year (clip) = 2012-04-21"
+  , "2005-06-30 + 7 * year (clip) = 2012-06-30"
+  , "2005-02-28 + 83 * year (clip) = 2088-02-28"
+  , "2004-02-29 + 83 * year (clip) = 2087-02-28"
+  , "2004-01-31 + 83 * year (clip) = 2087-01-31"
+  , "2004-12-31 + 83 * year (clip) = 2087-12-31"
+  , "2005-07-01 + 83 * year (clip) = 2088-07-01"
+  , "2005-04-21 + 83 * year (clip) = 2088-04-21"
+  , "2005-06-30 + 83 * year (clip) = 2088-06-30"
+  , "2005-02-28 + -10 * year (roll over) = 1995-02-28"
+  , "2004-02-29 + -10 * year (roll over) = 1994-03-01"
+  , "2004-01-31 + -10 * year (roll over) = 1994-01-31"
+  , "2004-12-31 + -10 * year (roll over) = 1994-12-31"
+  , "2005-07-01 + -10 * year (roll over) = 1995-07-01"
+  , "2005-04-21 + -10 * year (roll over) = 1995-04-21"
+  , "2005-06-30 + -10 * year (roll over) = 1995-06-30"
+  , "2005-02-28 + -4 * year (roll over) = 2001-02-28"
+  , "2004-02-29 + -4 * year (roll over) = 2000-02-29"
+  , "2004-01-31 + -4 * year (roll over) = 2000-01-31"
+  , "2004-12-31 + -4 * year (roll over) = 2000-12-31"
+  , "2005-07-01 + -4 * year (roll over) = 2001-07-01"
+  , "2005-04-21 + -4 * year (roll over) = 2001-04-21"
+  , "2005-06-30 + -4 * year (roll over) = 2001-06-30"
+  , "2005-02-28 + -1 * year (roll over) = 2004-02-28"
+  , "2004-02-29 + -1 * year (roll over) = 2003-03-01"
+  , "2004-01-31 + -1 * year (roll over) = 2003-01-31"
+  , "2004-12-31 + -1 * year (roll over) = 2003-12-31"
+  , "2005-07-01 + -1 * year (roll over) = 2004-07-01"
+  , "2005-04-21 + -1 * year (roll over) = 2004-04-21"
+  , "2005-06-30 + -1 * year (roll over) = 2004-06-30"
+  , "2005-02-28 + 0 * year (roll over) = 2005-02-28"
+  , "2004-02-29 + 0 * year (roll over) = 2004-02-29"
+  , "2004-01-31 + 0 * year (roll over) = 2004-01-31"
+  , "2004-12-31 + 0 * year (roll over) = 2004-12-31"
+  , "2005-07-01 + 0 * year (roll over) = 2005-07-01"
+  , "2005-04-21 + 0 * year (roll over) = 2005-04-21"
+  , "2005-06-30 + 0 * year (roll over) = 2005-06-30"
+  , "2005-02-28 + 1 * year (roll over) = 2006-02-28"
+  , "2004-02-29 + 1 * year (roll over) = 2005-03-01"
+  , "2004-01-31 + 1 * year (roll over) = 2005-01-31"
+  , "2004-12-31 + 1 * year (roll over) = 2005-12-31"
+  , "2005-07-01 + 1 * year (roll over) = 2006-07-01"
+  , "2005-04-21 + 1 * year (roll over) = 2006-04-21"
+  , "2005-06-30 + 1 * year (roll over) = 2006-06-30"
+  , "2005-02-28 + 7 * year (roll over) = 2012-02-28"
+  , "2004-02-29 + 7 * year (roll over) = 2011-03-01"
+  , "2004-01-31 + 7 * year (roll over) = 2011-01-31"
+  , "2004-12-31 + 7 * year (roll over) = 2011-12-31"
+  , "2005-07-01 + 7 * year (roll over) = 2012-07-01"
+  , "2005-04-21 + 7 * year (roll over) = 2012-04-21"
+  , "2005-06-30 + 7 * year (roll over) = 2012-06-30"
+  , "2005-02-28 + 83 * year (roll over) = 2088-02-28"
+  , "2004-02-29 + 83 * year (roll over) = 2087-03-01"
+  , "2004-01-31 + 83 * year (roll over) = 2087-01-31"
+  , "2004-12-31 + 83 * year (roll over) = 2087-12-31"
+  , "2005-07-01 + 83 * year (roll over) = 2088-07-01"
+  , "2005-04-21 + 83 * year (roll over) = 2088-04-21"
+  , "2005-06-30 + 83 * year (roll over) = 2088-06-30" ]
diff --git a/test/main/Test/Calendar/Calendars.hs b/test/main/Test/Calendar/Calendars.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/Calendars.hs
@@ -0,0 +1,32 @@
+module Test.Calendar.Calendars(testCalendars) where
+
+import Data.Time.Calendar.Julian.Compat
+import Data.Time.Calendar.WeekDate.Compat
+import Data.Time.Calendar.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Calendar.CalendarsRef
+
+showers :: [(String,Day -> String)]
+showers = [
+    ("MJD",show . toModifiedJulianDay),
+    ("Gregorian",showGregorian),
+    ("Julian",showJulian),
+    ("ISO 8601",showWeekDate)
+    ]
+
+days :: [Day]
+days = [
+    fromGregorian 0 12 31,
+    fromJulian 1752 9 2,
+    fromGregorian 1752 9 14,
+    fromGregorian 2005 1 23
+    ]
+
+testCalendars :: TestTree
+testCalendars = testCase "testCalendars" $
+    assertEqual "" testCalendarsRef $ unlines $ map (\d -> showShowers d) days
+  where
+    showShowers day =
+        concatMap (\(nm,shower) -> unwords [" ==", nm, shower day]) showers
diff --git a/test/main/Test/Calendar/CalendarsRef.hs b/test/main/Test/Calendar/CalendarsRef.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/CalendarsRef.hs
@@ -0,0 +1,9 @@
+module Test.Calendar.CalendarsRef where
+
+testCalendarsRef :: String
+testCalendarsRef =
+ unlines
+  [ " == MJD -678576 == Gregorian 0000-12-31 == Julian 0001-01-02 == ISO 8601 0000-W52-7"
+  , " == MJD -38780 == Gregorian 1752-09-13 == Julian 1752-09-02 == ISO 8601 1752-W37-3"
+  , " == MJD -38779 == Gregorian 1752-09-14 == Julian 1752-09-03 == ISO 8601 1752-W37-4"
+  , " == MJD 53393 == Gregorian 2005-01-23 == Julian 2005-01-10 == ISO 8601 2005-W03-7" ]
diff --git a/test/main/Test/Calendar/ClipDates.hs b/test/main/Test/Calendar/ClipDates.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/ClipDates.hs
@@ -0,0 +1,46 @@
+module Test.Calendar.ClipDates(clipDates) where
+
+import Data.Time.Calendar.OrdinalDate.Compat
+import Data.Time.Calendar.WeekDate.Compat
+import Data.Time.Calendar.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Calendar.ClipDatesRef
+
+yearAndDay :: (Integer,Int) -> String
+yearAndDay (y,d) = (show y) ++ "-" ++ (show d) ++ " = " ++ (showOrdinalDate (fromOrdinalDate y d))
+
+gregorian :: (Integer,Int,Int) -> String
+gregorian (y,m,d) = (show y) ++ "-" ++ (show m) ++ "-" ++ (show d) ++ " = " ++ (showGregorian (fromGregorian y m d))
+
+iSOWeekDay :: (Integer,Int,Int) -> String
+iSOWeekDay (y,w,d) = (show y) ++ "-W" ++ (show w) ++ "-" ++ (show d) ++ " = " ++ (showWeekDate (fromWeekDate y w d))
+
+--
+
+tupleUp2 :: [a] -> [b] -> [(a, b)]
+tupleUp2 l1 l2 = concatMap (\e -> map (e,) l2) l1
+
+tupleUp3 :: [a] -> [b] -> [c] -> [(a, b, c)]
+tupleUp3 l1 l2 l3
+  = let ts = tupleUp2 l2 l3
+    in concatMap (\e -> map (\(f, g) -> (e, f, g)) ts) l1
+
+--
+
+clipDates :: TestTree
+clipDates = testCase "clipDates" $
+    let
+        yad  = unlines $ map yearAndDay $
+            tupleUp2 [1968,1969,1971] [-4,0,1,200,364,365,366,367,700]
+
+
+        greg = unlines $ map gregorian $
+            tupleUp3 [1968,1969,1971] [-20,-1,0,1,2,12,13,17] [-7,-1,0,1,2,27,28,29,30,31,32,40]
+
+        iso  = unlines $ map iSOWeekDay $
+            tupleUp3 [1968,1969,2004] [-20,-1,0,1,20,51,52,53,54] [-2,-1,0,1,4,6,7,8,9]
+
+    in assertEqual "" clipDatesRef $
+        concat [ "YearAndDay\n", yad, "Gregorian\n", greg, "ISOWeekDay\n", iso ]
diff --git a/test/main/Test/Calendar/ClipDatesRef.hs b/test/main/Test/Calendar/ClipDatesRef.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/ClipDatesRef.hs
@@ -0,0 +1,566 @@
+module Test.Calendar.ClipDatesRef where
+
+clipDatesRef :: String
+clipDatesRef =
+ unlines
+  [ "YearAndDay"
+  , "1968--4 = 1968-001"
+  , "1968-0 = 1968-001"
+  , "1968-1 = 1968-001"
+  , "1968-200 = 1968-200"
+  , "1968-364 = 1968-364"
+  , "1968-365 = 1968-365"
+  , "1968-366 = 1968-366"
+  , "1968-367 = 1968-366"
+  , "1968-700 = 1968-366"
+  , "1969--4 = 1969-001"
+  , "1969-0 = 1969-001"
+  , "1969-1 = 1969-001"
+  , "1969-200 = 1969-200"
+  , "1969-364 = 1969-364"
+  , "1969-365 = 1969-365"
+  , "1969-366 = 1969-365"
+  , "1969-367 = 1969-365"
+  , "1969-700 = 1969-365"
+  , "1971--4 = 1971-001"
+  , "1971-0 = 1971-001"
+  , "1971-1 = 1971-001"
+  , "1971-200 = 1971-200"
+  , "1971-364 = 1971-364"
+  , "1971-365 = 1971-365"
+  , "1971-366 = 1971-365"
+  , "1971-367 = 1971-365"
+  , "1971-700 = 1971-365"
+  , "Gregorian"
+  , "1968--20--7 = 1968-01-01"
+  , "1968--20--1 = 1968-01-01"
+  , "1968--20-0 = 1968-01-01"
+  , "1968--20-1 = 1968-01-01"
+  , "1968--20-2 = 1968-01-02"
+  , "1968--20-27 = 1968-01-27"
+  , "1968--20-28 = 1968-01-28"
+  , "1968--20-29 = 1968-01-29"
+  , "1968--20-30 = 1968-01-30"
+  , "1968--20-31 = 1968-01-31"
+  , "1968--20-32 = 1968-01-31"
+  , "1968--20-40 = 1968-01-31"
+  , "1968--1--7 = 1968-01-01"
+  , "1968--1--1 = 1968-01-01"
+  , "1968--1-0 = 1968-01-01"
+  , "1968--1-1 = 1968-01-01"
+  , "1968--1-2 = 1968-01-02"
+  , "1968--1-27 = 1968-01-27"
+  , "1968--1-28 = 1968-01-28"
+  , "1968--1-29 = 1968-01-29"
+  , "1968--1-30 = 1968-01-30"
+  , "1968--1-31 = 1968-01-31"
+  , "1968--1-32 = 1968-01-31"
+  , "1968--1-40 = 1968-01-31"
+  , "1968-0--7 = 1968-01-01"
+  , "1968-0--1 = 1968-01-01"
+  , "1968-0-0 = 1968-01-01"
+  , "1968-0-1 = 1968-01-01"
+  , "1968-0-2 = 1968-01-02"
+  , "1968-0-27 = 1968-01-27"
+  , "1968-0-28 = 1968-01-28"
+  , "1968-0-29 = 1968-01-29"
+  , "1968-0-30 = 1968-01-30"
+  , "1968-0-31 = 1968-01-31"
+  , "1968-0-32 = 1968-01-31"
+  , "1968-0-40 = 1968-01-31"
+  , "1968-1--7 = 1968-01-01"
+  , "1968-1--1 = 1968-01-01"
+  , "1968-1-0 = 1968-01-01"
+  , "1968-1-1 = 1968-01-01"
+  , "1968-1-2 = 1968-01-02"
+  , "1968-1-27 = 1968-01-27"
+  , "1968-1-28 = 1968-01-28"
+  , "1968-1-29 = 1968-01-29"
+  , "1968-1-30 = 1968-01-30"
+  , "1968-1-31 = 1968-01-31"
+  , "1968-1-32 = 1968-01-31"
+  , "1968-1-40 = 1968-01-31"
+  , "1968-2--7 = 1968-02-01"
+  , "1968-2--1 = 1968-02-01"
+  , "1968-2-0 = 1968-02-01"
+  , "1968-2-1 = 1968-02-01"
+  , "1968-2-2 = 1968-02-02"
+  , "1968-2-27 = 1968-02-27"
+  , "1968-2-28 = 1968-02-28"
+  , "1968-2-29 = 1968-02-29"
+  , "1968-2-30 = 1968-02-29"
+  , "1968-2-31 = 1968-02-29"
+  , "1968-2-32 = 1968-02-29"
+  , "1968-2-40 = 1968-02-29"
+  , "1968-12--7 = 1968-12-01"
+  , "1968-12--1 = 1968-12-01"
+  , "1968-12-0 = 1968-12-01"
+  , "1968-12-1 = 1968-12-01"
+  , "1968-12-2 = 1968-12-02"
+  , "1968-12-27 = 1968-12-27"
+  , "1968-12-28 = 1968-12-28"
+  , "1968-12-29 = 1968-12-29"
+  , "1968-12-30 = 1968-12-30"
+  , "1968-12-31 = 1968-12-31"
+  , "1968-12-32 = 1968-12-31"
+  , "1968-12-40 = 1968-12-31"
+  , "1968-13--7 = 1968-12-01"
+  , "1968-13--1 = 1968-12-01"
+  , "1968-13-0 = 1968-12-01"
+  , "1968-13-1 = 1968-12-01"
+  , "1968-13-2 = 1968-12-02"
+  , "1968-13-27 = 1968-12-27"
+  , "1968-13-28 = 1968-12-28"
+  , "1968-13-29 = 1968-12-29"
+  , "1968-13-30 = 1968-12-30"
+  , "1968-13-31 = 1968-12-31"
+  , "1968-13-32 = 1968-12-31"
+  , "1968-13-40 = 1968-12-31"
+  , "1968-17--7 = 1968-12-01"
+  , "1968-17--1 = 1968-12-01"
+  , "1968-17-0 = 1968-12-01"
+  , "1968-17-1 = 1968-12-01"
+  , "1968-17-2 = 1968-12-02"
+  , "1968-17-27 = 1968-12-27"
+  , "1968-17-28 = 1968-12-28"
+  , "1968-17-29 = 1968-12-29"
+  , "1968-17-30 = 1968-12-30"
+  , "1968-17-31 = 1968-12-31"
+  , "1968-17-32 = 1968-12-31"
+  , "1968-17-40 = 1968-12-31"
+  , "1969--20--7 = 1969-01-01"
+  , "1969--20--1 = 1969-01-01"
+  , "1969--20-0 = 1969-01-01"
+  , "1969--20-1 = 1969-01-01"
+  , "1969--20-2 = 1969-01-02"
+  , "1969--20-27 = 1969-01-27"
+  , "1969--20-28 = 1969-01-28"
+  , "1969--20-29 = 1969-01-29"
+  , "1969--20-30 = 1969-01-30"
+  , "1969--20-31 = 1969-01-31"
+  , "1969--20-32 = 1969-01-31"
+  , "1969--20-40 = 1969-01-31"
+  , "1969--1--7 = 1969-01-01"
+  , "1969--1--1 = 1969-01-01"
+  , "1969--1-0 = 1969-01-01"
+  , "1969--1-1 = 1969-01-01"
+  , "1969--1-2 = 1969-01-02"
+  , "1969--1-27 = 1969-01-27"
+  , "1969--1-28 = 1969-01-28"
+  , "1969--1-29 = 1969-01-29"
+  , "1969--1-30 = 1969-01-30"
+  , "1969--1-31 = 1969-01-31"
+  , "1969--1-32 = 1969-01-31"
+  , "1969--1-40 = 1969-01-31"
+  , "1969-0--7 = 1969-01-01"
+  , "1969-0--1 = 1969-01-01"
+  , "1969-0-0 = 1969-01-01"
+  , "1969-0-1 = 1969-01-01"
+  , "1969-0-2 = 1969-01-02"
+  , "1969-0-27 = 1969-01-27"
+  , "1969-0-28 = 1969-01-28"
+  , "1969-0-29 = 1969-01-29"
+  , "1969-0-30 = 1969-01-30"
+  , "1969-0-31 = 1969-01-31"
+  , "1969-0-32 = 1969-01-31"
+  , "1969-0-40 = 1969-01-31"
+  , "1969-1--7 = 1969-01-01"
+  , "1969-1--1 = 1969-01-01"
+  , "1969-1-0 = 1969-01-01"
+  , "1969-1-1 = 1969-01-01"
+  , "1969-1-2 = 1969-01-02"
+  , "1969-1-27 = 1969-01-27"
+  , "1969-1-28 = 1969-01-28"
+  , "1969-1-29 = 1969-01-29"
+  , "1969-1-30 = 1969-01-30"
+  , "1969-1-31 = 1969-01-31"
+  , "1969-1-32 = 1969-01-31"
+  , "1969-1-40 = 1969-01-31"
+  , "1969-2--7 = 1969-02-01"
+  , "1969-2--1 = 1969-02-01"
+  , "1969-2-0 = 1969-02-01"
+  , "1969-2-1 = 1969-02-01"
+  , "1969-2-2 = 1969-02-02"
+  , "1969-2-27 = 1969-02-27"
+  , "1969-2-28 = 1969-02-28"
+  , "1969-2-29 = 1969-02-28"
+  , "1969-2-30 = 1969-02-28"
+  , "1969-2-31 = 1969-02-28"
+  , "1969-2-32 = 1969-02-28"
+  , "1969-2-40 = 1969-02-28"
+  , "1969-12--7 = 1969-12-01"
+  , "1969-12--1 = 1969-12-01"
+  , "1969-12-0 = 1969-12-01"
+  , "1969-12-1 = 1969-12-01"
+  , "1969-12-2 = 1969-12-02"
+  , "1969-12-27 = 1969-12-27"
+  , "1969-12-28 = 1969-12-28"
+  , "1969-12-29 = 1969-12-29"
+  , "1969-12-30 = 1969-12-30"
+  , "1969-12-31 = 1969-12-31"
+  , "1969-12-32 = 1969-12-31"
+  , "1969-12-40 = 1969-12-31"
+  , "1969-13--7 = 1969-12-01"
+  , "1969-13--1 = 1969-12-01"
+  , "1969-13-0 = 1969-12-01"
+  , "1969-13-1 = 1969-12-01"
+  , "1969-13-2 = 1969-12-02"
+  , "1969-13-27 = 1969-12-27"
+  , "1969-13-28 = 1969-12-28"
+  , "1969-13-29 = 1969-12-29"
+  , "1969-13-30 = 1969-12-30"
+  , "1969-13-31 = 1969-12-31"
+  , "1969-13-32 = 1969-12-31"
+  , "1969-13-40 = 1969-12-31"
+  , "1969-17--7 = 1969-12-01"
+  , "1969-17--1 = 1969-12-01"
+  , "1969-17-0 = 1969-12-01"
+  , "1969-17-1 = 1969-12-01"
+  , "1969-17-2 = 1969-12-02"
+  , "1969-17-27 = 1969-12-27"
+  , "1969-17-28 = 1969-12-28"
+  , "1969-17-29 = 1969-12-29"
+  , "1969-17-30 = 1969-12-30"
+  , "1969-17-31 = 1969-12-31"
+  , "1969-17-32 = 1969-12-31"
+  , "1969-17-40 = 1969-12-31"
+  , "1971--20--7 = 1971-01-01"
+  , "1971--20--1 = 1971-01-01"
+  , "1971--20-0 = 1971-01-01"
+  , "1971--20-1 = 1971-01-01"
+  , "1971--20-2 = 1971-01-02"
+  , "1971--20-27 = 1971-01-27"
+  , "1971--20-28 = 1971-01-28"
+  , "1971--20-29 = 1971-01-29"
+  , "1971--20-30 = 1971-01-30"
+  , "1971--20-31 = 1971-01-31"
+  , "1971--20-32 = 1971-01-31"
+  , "1971--20-40 = 1971-01-31"
+  , "1971--1--7 = 1971-01-01"
+  , "1971--1--1 = 1971-01-01"
+  , "1971--1-0 = 1971-01-01"
+  , "1971--1-1 = 1971-01-01"
+  , "1971--1-2 = 1971-01-02"
+  , "1971--1-27 = 1971-01-27"
+  , "1971--1-28 = 1971-01-28"
+  , "1971--1-29 = 1971-01-29"
+  , "1971--1-30 = 1971-01-30"
+  , "1971--1-31 = 1971-01-31"
+  , "1971--1-32 = 1971-01-31"
+  , "1971--1-40 = 1971-01-31"
+  , "1971-0--7 = 1971-01-01"
+  , "1971-0--1 = 1971-01-01"
+  , "1971-0-0 = 1971-01-01"
+  , "1971-0-1 = 1971-01-01"
+  , "1971-0-2 = 1971-01-02"
+  , "1971-0-27 = 1971-01-27"
+  , "1971-0-28 = 1971-01-28"
+  , "1971-0-29 = 1971-01-29"
+  , "1971-0-30 = 1971-01-30"
+  , "1971-0-31 = 1971-01-31"
+  , "1971-0-32 = 1971-01-31"
+  , "1971-0-40 = 1971-01-31"
+  , "1971-1--7 = 1971-01-01"
+  , "1971-1--1 = 1971-01-01"
+  , "1971-1-0 = 1971-01-01"
+  , "1971-1-1 = 1971-01-01"
+  , "1971-1-2 = 1971-01-02"
+  , "1971-1-27 = 1971-01-27"
+  , "1971-1-28 = 1971-01-28"
+  , "1971-1-29 = 1971-01-29"
+  , "1971-1-30 = 1971-01-30"
+  , "1971-1-31 = 1971-01-31"
+  , "1971-1-32 = 1971-01-31"
+  , "1971-1-40 = 1971-01-31"
+  , "1971-2--7 = 1971-02-01"
+  , "1971-2--1 = 1971-02-01"
+  , "1971-2-0 = 1971-02-01"
+  , "1971-2-1 = 1971-02-01"
+  , "1971-2-2 = 1971-02-02"
+  , "1971-2-27 = 1971-02-27"
+  , "1971-2-28 = 1971-02-28"
+  , "1971-2-29 = 1971-02-28"
+  , "1971-2-30 = 1971-02-28"
+  , "1971-2-31 = 1971-02-28"
+  , "1971-2-32 = 1971-02-28"
+  , "1971-2-40 = 1971-02-28"
+  , "1971-12--7 = 1971-12-01"
+  , "1971-12--1 = 1971-12-01"
+  , "1971-12-0 = 1971-12-01"
+  , "1971-12-1 = 1971-12-01"
+  , "1971-12-2 = 1971-12-02"
+  , "1971-12-27 = 1971-12-27"
+  , "1971-12-28 = 1971-12-28"
+  , "1971-12-29 = 1971-12-29"
+  , "1971-12-30 = 1971-12-30"
+  , "1971-12-31 = 1971-12-31"
+  , "1971-12-32 = 1971-12-31"
+  , "1971-12-40 = 1971-12-31"
+  , "1971-13--7 = 1971-12-01"
+  , "1971-13--1 = 1971-12-01"
+  , "1971-13-0 = 1971-12-01"
+  , "1971-13-1 = 1971-12-01"
+  , "1971-13-2 = 1971-12-02"
+  , "1971-13-27 = 1971-12-27"
+  , "1971-13-28 = 1971-12-28"
+  , "1971-13-29 = 1971-12-29"
+  , "1971-13-30 = 1971-12-30"
+  , "1971-13-31 = 1971-12-31"
+  , "1971-13-32 = 1971-12-31"
+  , "1971-13-40 = 1971-12-31"
+  , "1971-17--7 = 1971-12-01"
+  , "1971-17--1 = 1971-12-01"
+  , "1971-17-0 = 1971-12-01"
+  , "1971-17-1 = 1971-12-01"
+  , "1971-17-2 = 1971-12-02"
+  , "1971-17-27 = 1971-12-27"
+  , "1971-17-28 = 1971-12-28"
+  , "1971-17-29 = 1971-12-29"
+  , "1971-17-30 = 1971-12-30"
+  , "1971-17-31 = 1971-12-31"
+  , "1971-17-32 = 1971-12-31"
+  , "1971-17-40 = 1971-12-31"
+  , "ISOWeekDay"
+  , "1968-W-20--2 = 1968-W01-1"
+  , "1968-W-20--1 = 1968-W01-1"
+  , "1968-W-20-0 = 1968-W01-1"
+  , "1968-W-20-1 = 1968-W01-1"
+  , "1968-W-20-4 = 1968-W01-4"
+  , "1968-W-20-6 = 1968-W01-6"
+  , "1968-W-20-7 = 1968-W01-7"
+  , "1968-W-20-8 = 1968-W01-7"
+  , "1968-W-20-9 = 1968-W01-7"
+  , "1968-W-1--2 = 1968-W01-1"
+  , "1968-W-1--1 = 1968-W01-1"
+  , "1968-W-1-0 = 1968-W01-1"
+  , "1968-W-1-1 = 1968-W01-1"
+  , "1968-W-1-4 = 1968-W01-4"
+  , "1968-W-1-6 = 1968-W01-6"
+  , "1968-W-1-7 = 1968-W01-7"
+  , "1968-W-1-8 = 1968-W01-7"
+  , "1968-W-1-9 = 1968-W01-7"
+  , "1968-W0--2 = 1968-W01-1"
+  , "1968-W0--1 = 1968-W01-1"
+  , "1968-W0-0 = 1968-W01-1"
+  , "1968-W0-1 = 1968-W01-1"
+  , "1968-W0-4 = 1968-W01-4"
+  , "1968-W0-6 = 1968-W01-6"
+  , "1968-W0-7 = 1968-W01-7"
+  , "1968-W0-8 = 1968-W01-7"
+  , "1968-W0-9 = 1968-W01-7"
+  , "1968-W1--2 = 1968-W01-1"
+  , "1968-W1--1 = 1968-W01-1"
+  , "1968-W1-0 = 1968-W01-1"
+  , "1968-W1-1 = 1968-W01-1"
+  , "1968-W1-4 = 1968-W01-4"
+  , "1968-W1-6 = 1968-W01-6"
+  , "1968-W1-7 = 1968-W01-7"
+  , "1968-W1-8 = 1968-W01-7"
+  , "1968-W1-9 = 1968-W01-7"
+  , "1968-W20--2 = 1968-W20-1"
+  , "1968-W20--1 = 1968-W20-1"
+  , "1968-W20-0 = 1968-W20-1"
+  , "1968-W20-1 = 1968-W20-1"
+  , "1968-W20-4 = 1968-W20-4"
+  , "1968-W20-6 = 1968-W20-6"
+  , "1968-W20-7 = 1968-W20-7"
+  , "1968-W20-8 = 1968-W20-7"
+  , "1968-W20-9 = 1968-W20-7"
+  , "1968-W51--2 = 1968-W51-1"
+  , "1968-W51--1 = 1968-W51-1"
+  , "1968-W51-0 = 1968-W51-1"
+  , "1968-W51-1 = 1968-W51-1"
+  , "1968-W51-4 = 1968-W51-4"
+  , "1968-W51-6 = 1968-W51-6"
+  , "1968-W51-7 = 1968-W51-7"
+  , "1968-W51-8 = 1968-W51-7"
+  , "1968-W51-9 = 1968-W51-7"
+  , "1968-W52--2 = 1968-W52-1"
+  , "1968-W52--1 = 1968-W52-1"
+  , "1968-W52-0 = 1968-W52-1"
+  , "1968-W52-1 = 1968-W52-1"
+  , "1968-W52-4 = 1968-W52-4"
+  , "1968-W52-6 = 1968-W52-6"
+  , "1968-W52-7 = 1968-W52-7"
+  , "1968-W52-8 = 1968-W52-7"
+  , "1968-W52-9 = 1968-W52-7"
+  , "1968-W53--2 = 1968-W52-1"
+  , "1968-W53--1 = 1968-W52-1"
+  , "1968-W53-0 = 1968-W52-1"
+  , "1968-W53-1 = 1968-W52-1"
+  , "1968-W53-4 = 1968-W52-4"
+  , "1968-W53-6 = 1968-W52-6"
+  , "1968-W53-7 = 1968-W52-7"
+  , "1968-W53-8 = 1968-W52-7"
+  , "1968-W53-9 = 1968-W52-7"
+  , "1968-W54--2 = 1968-W52-1"
+  , "1968-W54--1 = 1968-W52-1"
+  , "1968-W54-0 = 1968-W52-1"
+  , "1968-W54-1 = 1968-W52-1"
+  , "1968-W54-4 = 1968-W52-4"
+  , "1968-W54-6 = 1968-W52-6"
+  , "1968-W54-7 = 1968-W52-7"
+  , "1968-W54-8 = 1968-W52-7"
+  , "1968-W54-9 = 1968-W52-7"
+  , "1969-W-20--2 = 1969-W01-1"
+  , "1969-W-20--1 = 1969-W01-1"
+  , "1969-W-20-0 = 1969-W01-1"
+  , "1969-W-20-1 = 1969-W01-1"
+  , "1969-W-20-4 = 1969-W01-4"
+  , "1969-W-20-6 = 1969-W01-6"
+  , "1969-W-20-7 = 1969-W01-7"
+  , "1969-W-20-8 = 1969-W01-7"
+  , "1969-W-20-9 = 1969-W01-7"
+  , "1969-W-1--2 = 1969-W01-1"
+  , "1969-W-1--1 = 1969-W01-1"
+  , "1969-W-1-0 = 1969-W01-1"
+  , "1969-W-1-1 = 1969-W01-1"
+  , "1969-W-1-4 = 1969-W01-4"
+  , "1969-W-1-6 = 1969-W01-6"
+  , "1969-W-1-7 = 1969-W01-7"
+  , "1969-W-1-8 = 1969-W01-7"
+  , "1969-W-1-9 = 1969-W01-7"
+  , "1969-W0--2 = 1969-W01-1"
+  , "1969-W0--1 = 1969-W01-1"
+  , "1969-W0-0 = 1969-W01-1"
+  , "1969-W0-1 = 1969-W01-1"
+  , "1969-W0-4 = 1969-W01-4"
+  , "1969-W0-6 = 1969-W01-6"
+  , "1969-W0-7 = 1969-W01-7"
+  , "1969-W0-8 = 1969-W01-7"
+  , "1969-W0-9 = 1969-W01-7"
+  , "1969-W1--2 = 1969-W01-1"
+  , "1969-W1--1 = 1969-W01-1"
+  , "1969-W1-0 = 1969-W01-1"
+  , "1969-W1-1 = 1969-W01-1"
+  , "1969-W1-4 = 1969-W01-4"
+  , "1969-W1-6 = 1969-W01-6"
+  , "1969-W1-7 = 1969-W01-7"
+  , "1969-W1-8 = 1969-W01-7"
+  , "1969-W1-9 = 1969-W01-7"
+  , "1969-W20--2 = 1969-W20-1"
+  , "1969-W20--1 = 1969-W20-1"
+  , "1969-W20-0 = 1969-W20-1"
+  , "1969-W20-1 = 1969-W20-1"
+  , "1969-W20-4 = 1969-W20-4"
+  , "1969-W20-6 = 1969-W20-6"
+  , "1969-W20-7 = 1969-W20-7"
+  , "1969-W20-8 = 1969-W20-7"
+  , "1969-W20-9 = 1969-W20-7"
+  , "1969-W51--2 = 1969-W51-1"
+  , "1969-W51--1 = 1969-W51-1"
+  , "1969-W51-0 = 1969-W51-1"
+  , "1969-W51-1 = 1969-W51-1"
+  , "1969-W51-4 = 1969-W51-4"
+  , "1969-W51-6 = 1969-W51-6"
+  , "1969-W51-7 = 1969-W51-7"
+  , "1969-W51-8 = 1969-W51-7"
+  , "1969-W51-9 = 1969-W51-7"
+  , "1969-W52--2 = 1969-W52-1"
+  , "1969-W52--1 = 1969-W52-1"
+  , "1969-W52-0 = 1969-W52-1"
+  , "1969-W52-1 = 1969-W52-1"
+  , "1969-W52-4 = 1969-W52-4"
+  , "1969-W52-6 = 1969-W52-6"
+  , "1969-W52-7 = 1969-W52-7"
+  , "1969-W52-8 = 1969-W52-7"
+  , "1969-W52-9 = 1969-W52-7"
+  , "1969-W53--2 = 1969-W52-1"
+  , "1969-W53--1 = 1969-W52-1"
+  , "1969-W53-0 = 1969-W52-1"
+  , "1969-W53-1 = 1969-W52-1"
+  , "1969-W53-4 = 1969-W52-4"
+  , "1969-W53-6 = 1969-W52-6"
+  , "1969-W53-7 = 1969-W52-7"
+  , "1969-W53-8 = 1969-W52-7"
+  , "1969-W53-9 = 1969-W52-7"
+  , "1969-W54--2 = 1969-W52-1"
+  , "1969-W54--1 = 1969-W52-1"
+  , "1969-W54-0 = 1969-W52-1"
+  , "1969-W54-1 = 1969-W52-1"
+  , "1969-W54-4 = 1969-W52-4"
+  , "1969-W54-6 = 1969-W52-6"
+  , "1969-W54-7 = 1969-W52-7"
+  , "1969-W54-8 = 1969-W52-7"
+  , "1969-W54-9 = 1969-W52-7"
+  , "2004-W-20--2 = 2004-W01-1"
+  , "2004-W-20--1 = 2004-W01-1"
+  , "2004-W-20-0 = 2004-W01-1"
+  , "2004-W-20-1 = 2004-W01-1"
+  , "2004-W-20-4 = 2004-W01-4"
+  , "2004-W-20-6 = 2004-W01-6"
+  , "2004-W-20-7 = 2004-W01-7"
+  , "2004-W-20-8 = 2004-W01-7"
+  , "2004-W-20-9 = 2004-W01-7"
+  , "2004-W-1--2 = 2004-W01-1"
+  , "2004-W-1--1 = 2004-W01-1"
+  , "2004-W-1-0 = 2004-W01-1"
+  , "2004-W-1-1 = 2004-W01-1"
+  , "2004-W-1-4 = 2004-W01-4"
+  , "2004-W-1-6 = 2004-W01-6"
+  , "2004-W-1-7 = 2004-W01-7"
+  , "2004-W-1-8 = 2004-W01-7"
+  , "2004-W-1-9 = 2004-W01-7"
+  , "2004-W0--2 = 2004-W01-1"
+  , "2004-W0--1 = 2004-W01-1"
+  , "2004-W0-0 = 2004-W01-1"
+  , "2004-W0-1 = 2004-W01-1"
+  , "2004-W0-4 = 2004-W01-4"
+  , "2004-W0-6 = 2004-W01-6"
+  , "2004-W0-7 = 2004-W01-7"
+  , "2004-W0-8 = 2004-W01-7"
+  , "2004-W0-9 = 2004-W01-7"
+  , "2004-W1--2 = 2004-W01-1"
+  , "2004-W1--1 = 2004-W01-1"
+  , "2004-W1-0 = 2004-W01-1"
+  , "2004-W1-1 = 2004-W01-1"
+  , "2004-W1-4 = 2004-W01-4"
+  , "2004-W1-6 = 2004-W01-6"
+  , "2004-W1-7 = 2004-W01-7"
+  , "2004-W1-8 = 2004-W01-7"
+  , "2004-W1-9 = 2004-W01-7"
+  , "2004-W20--2 = 2004-W20-1"
+  , "2004-W20--1 = 2004-W20-1"
+  , "2004-W20-0 = 2004-W20-1"
+  , "2004-W20-1 = 2004-W20-1"
+  , "2004-W20-4 = 2004-W20-4"
+  , "2004-W20-6 = 2004-W20-6"
+  , "2004-W20-7 = 2004-W20-7"
+  , "2004-W20-8 = 2004-W20-7"
+  , "2004-W20-9 = 2004-W20-7"
+  , "2004-W51--2 = 2004-W51-1"
+  , "2004-W51--1 = 2004-W51-1"
+  , "2004-W51-0 = 2004-W51-1"
+  , "2004-W51-1 = 2004-W51-1"
+  , "2004-W51-4 = 2004-W51-4"
+  , "2004-W51-6 = 2004-W51-6"
+  , "2004-W51-7 = 2004-W51-7"
+  , "2004-W51-8 = 2004-W51-7"
+  , "2004-W51-9 = 2004-W51-7"
+  , "2004-W52--2 = 2004-W52-1"
+  , "2004-W52--1 = 2004-W52-1"
+  , "2004-W52-0 = 2004-W52-1"
+  , "2004-W52-1 = 2004-W52-1"
+  , "2004-W52-4 = 2004-W52-4"
+  , "2004-W52-6 = 2004-W52-6"
+  , "2004-W52-7 = 2004-W52-7"
+  , "2004-W52-8 = 2004-W52-7"
+  , "2004-W52-9 = 2004-W52-7"
+  , "2004-W53--2 = 2004-W53-1"
+  , "2004-W53--1 = 2004-W53-1"
+  , "2004-W53-0 = 2004-W53-1"
+  , "2004-W53-1 = 2004-W53-1"
+  , "2004-W53-4 = 2004-W53-4"
+  , "2004-W53-6 = 2004-W53-6"
+  , "2004-W53-7 = 2004-W53-7"
+  , "2004-W53-8 = 2004-W53-7"
+  , "2004-W53-9 = 2004-W53-7"
+  , "2004-W54--2 = 2004-W53-1"
+  , "2004-W54--1 = 2004-W53-1"
+  , "2004-W54-0 = 2004-W53-1"
+  , "2004-W54-1 = 2004-W53-1"
+  , "2004-W54-4 = 2004-W53-4"
+  , "2004-W54-6 = 2004-W53-6"
+  , "2004-W54-7 = 2004-W53-7"
+  , "2004-W54-8 = 2004-W53-7"
+  , "2004-W54-9 = 2004-W53-7" ]
diff --git a/test/main/Test/Calendar/ConvertBack.hs b/test/main/Test/Calendar/ConvertBack.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/ConvertBack.hs
@@ -0,0 +1,42 @@
+module Test.Calendar.ConvertBack(convertBack) where
+
+import Data.Time.Calendar.OrdinalDate.Compat
+import Data.Time.Calendar.Julian.Compat
+import Data.Time.Calendar.WeekDate.Compat
+import Data.Time.Calendar.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+
+checkDay :: (Show t) => (Day -> t) -> (t -> Day) -> (t -> Maybe Day) -> Day -> String
+checkDay encodeDay decodeDay decodeDayValid day = let
+    st    = encodeDay day
+    day'  = decodeDay st
+    mday' = decodeDayValid st
+
+    a = if day /= day'
+          then unwords [ show day, "-> "
+                           , show st,  "-> "
+                           , show day'
+                           , "(diff", show (diffDays day' day) ++ ")" ]
+          else ""
+
+    b = if Just day /= mday'
+          then unwords [show day, "->", show st, "->", show mday']
+          else ""
+    in a ++ b
+
+checkers :: [Day -> String]
+checkers
+  = [ checkDay toOrdinalDate (\(y,d) -> fromOrdinalDate y d) (\(y,d) -> fromOrdinalDateValid y d)
+    , checkDay toWeekDate (\(y,w,d) -> fromWeekDate y w d) (\(y,w,d) -> fromWeekDateValid y w d)
+    , checkDay toGregorian (\(y,m,d) -> fromGregorian y m d) (\(y,m,d) -> fromGregorianValid y m d)
+    , checkDay toJulian (\(y,m,d) -> fromJulian y m d) (\(y,m,d) -> fromJulianValid y m d) ]
+
+days :: [Day]
+days = [ModifiedJulianDay 50000 .. ModifiedJulianDay 50200] ++
+    (fmap (\year -> (fromGregorian year 1 4)) [1980..2000])
+
+convertBack :: TestTree
+convertBack = testCase "convertBack" $
+    assertEqual "" "" $ concatMap (\ch -> concatMap ch days) checkers
diff --git a/test/main/Test/Calendar/Duration.hs b/test/main/Test/Calendar/Duration.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/Duration.hs
@@ -0,0 +1,47 @@
+module Test.Calendar.Duration
+    ( testDuration
+    ) where
+
+import Data.Time.Calendar.Compat
+import Data.Time.Calendar.Julian.Compat
+
+import Test.Arbitrary ()
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Tasty.QuickCheck hiding (reason)
+
+testAddDiff :: TestTree
+testAddDiff =
+    testGroup
+        "add diff"
+        [ testProperty "add diff GregorianDurationClip" $ \day1 day2 ->
+              addGregorianDurationClip (diffGregorianDurationClip day2 day1) day1 == day2
+        , testProperty "add diff GregorianDurationRollOver" $ \day1 day2 ->
+              addGregorianDurationRollOver (diffGregorianDurationRollOver day2 day1) day1 == day2
+        , testProperty "add diff JulianDurationClip" $ \day1 day2 ->
+              addJulianDurationClip (diffJulianDurationClip day2 day1) day1 == day2
+        , testProperty "add diff JulianDurationRollOver" $ \day1 day2 ->
+              addJulianDurationRollOver (diffJulianDurationRollOver day2 day1) day1 == day2
+        ]
+
+testClip :: (Integer, Int, Int) -> (Integer, Int, Int) -> (Integer, Integer) -> TestTree
+testClip (y1,m1,d1) (y2,m2,d2) (em, ed) = let
+    day1 = fromGregorian y1 m1 d1
+    day2 = fromGregorian y2 m2 d2
+    expected = CalendarDiffDays em ed
+    found = diffGregorianDurationClip day1 day2
+    in testCase (show day1 ++ " - " ++ show day2) $ assertEqual "" expected found
+
+testDiffs :: TestTree
+testDiffs =
+    testGroup
+        "diffs"
+        [ testClip (2017, 04, 07) (2017, 04, 07) (0, 0)
+        , testClip (2017, 04, 07) (2017, 04, 01) (0, 6)
+        , testClip (2017, 04, 01) (2017, 04, 07) (0, -6)
+        , testClip (2017, 04, 07) (2017, 02, 01) (2, 6)
+        , testClip (2017, 02, 01) (2017, 04, 07) (-2, -6)
+        ]
+
+testDuration :: TestTree
+testDuration = testGroup "CalendarDiffDays" [testAddDiff, testDiffs]
diff --git a/test/main/Test/Calendar/Easter.hs b/test/main/Test/Calendar/Easter.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/Easter.hs
@@ -0,0 +1,35 @@
+module Test.Calendar.Easter(testEaster) where
+
+import Data.Time.Calendar.Easter.Compat
+import Data.Time.Calendar.Compat
+import Data.Time.Format.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Calendar.EasterRef
+
+--
+
+days :: [Day]
+days = [ModifiedJulianDay 53000 .. ModifiedJulianDay 53014]
+
+showWithWDay :: Day -> String
+showWithWDay = formatTime defaultTimeLocale "%F %A"
+
+testEaster :: TestTree
+testEaster = testCase "testEaster" $ let
+    ds = unlines $ map (\day ->
+                   unwords [ showWithWDay day, "->"
+                           , showWithWDay (sundayAfter day)]) days
+
+    f y = unwords [ show y ++ ", Gregorian: moon,"
+                          , show (gregorianPaschalMoon y) ++ ": Easter,"
+                          , showWithWDay (gregorianEaster y)]
+                  ++ "\n"
+
+    g y = unwords [ show y ++ ", Orthodox : moon,"
+                          , show (orthodoxPaschalMoon y) ++ ": Easter,"
+                          , showWithWDay (orthodoxEaster y)]
+                  ++ "\n"
+
+    in assertEqual "" testEasterRef $ ds ++ concatMap (\y -> f y ++ g y) [2000..2020]
diff --git a/test/main/Test/Calendar/EasterRef.hs b/test/main/Test/Calendar/EasterRef.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/EasterRef.hs
@@ -0,0 +1,62 @@
+module Test.Calendar.EasterRef where
+
+testEasterRef :: String
+testEasterRef =
+ unlines
+  [ "2003-12-27 Saturday -> 2003-12-28 Sunday"
+  , "2003-12-28 Sunday -> 2004-01-04 Sunday"
+  , "2003-12-29 Monday -> 2004-01-04 Sunday"
+  , "2003-12-30 Tuesday -> 2004-01-04 Sunday"
+  , "2003-12-31 Wednesday -> 2004-01-04 Sunday"
+  , "2004-01-01 Thursday -> 2004-01-04 Sunday"
+  , "2004-01-02 Friday -> 2004-01-04 Sunday"
+  , "2004-01-03 Saturday -> 2004-01-04 Sunday"
+  , "2004-01-04 Sunday -> 2004-01-11 Sunday"
+  , "2004-01-05 Monday -> 2004-01-11 Sunday"
+  , "2004-01-06 Tuesday -> 2004-01-11 Sunday"
+  , "2004-01-07 Wednesday -> 2004-01-11 Sunday"
+  , "2004-01-08 Thursday -> 2004-01-11 Sunday"
+  , "2004-01-09 Friday -> 2004-01-11 Sunday"
+  , "2004-01-10 Saturday -> 2004-01-11 Sunday"
+  , "2000, Gregorian: moon, 2000-04-18: Easter, 2000-04-23 Sunday"
+  , "2000, Orthodox : moon, 2000-04-23: Easter, 2000-04-30 Sunday"
+  , "2001, Gregorian: moon, 2001-04-08: Easter, 2001-04-15 Sunday"
+  , "2001, Orthodox : moon, 2001-04-12: Easter, 2001-04-15 Sunday"
+  , "2002, Gregorian: moon, 2002-03-28: Easter, 2002-03-31 Sunday"
+  , "2002, Orthodox : moon, 2002-05-01: Easter, 2002-05-05 Sunday"
+  , "2003, Gregorian: moon, 2003-04-16: Easter, 2003-04-20 Sunday"
+  , "2003, Orthodox : moon, 2003-04-20: Easter, 2003-04-27 Sunday"
+  , "2004, Gregorian: moon, 2004-04-05: Easter, 2004-04-11 Sunday"
+  , "2004, Orthodox : moon, 2004-04-09: Easter, 2004-04-11 Sunday"
+  , "2005, Gregorian: moon, 2005-03-25: Easter, 2005-03-27 Sunday"
+  , "2005, Orthodox : moon, 2005-04-28: Easter, 2005-05-01 Sunday"
+  , "2006, Gregorian: moon, 2006-04-13: Easter, 2006-04-16 Sunday"
+  , "2006, Orthodox : moon, 2006-04-17: Easter, 2006-04-23 Sunday"
+  , "2007, Gregorian: moon, 2007-04-02: Easter, 2007-04-08 Sunday"
+  , "2007, Orthodox : moon, 2007-04-06: Easter, 2007-04-08 Sunday"
+  , "2008, Gregorian: moon, 2008-03-22: Easter, 2008-03-23 Sunday"
+  , "2008, Orthodox : moon, 2008-04-25: Easter, 2008-04-27 Sunday"
+  , "2009, Gregorian: moon, 2009-04-10: Easter, 2009-04-12 Sunday"
+  , "2009, Orthodox : moon, 2009-04-14: Easter, 2009-04-19 Sunday"
+  , "2010, Gregorian: moon, 2010-03-30: Easter, 2010-04-04 Sunday"
+  , "2010, Orthodox : moon, 2010-04-03: Easter, 2010-04-04 Sunday"
+  , "2011, Gregorian: moon, 2011-04-18: Easter, 2011-04-24 Sunday"
+  , "2011, Orthodox : moon, 2011-04-22: Easter, 2011-04-24 Sunday"
+  , "2012, Gregorian: moon, 2012-04-07: Easter, 2012-04-08 Sunday"
+  , "2012, Orthodox : moon, 2012-04-11: Easter, 2012-04-15 Sunday"
+  , "2013, Gregorian: moon, 2013-03-27: Easter, 2013-03-31 Sunday"
+  , "2013, Orthodox : moon, 2013-04-30: Easter, 2013-05-05 Sunday"
+  , "2014, Gregorian: moon, 2014-04-14: Easter, 2014-04-20 Sunday"
+  , "2014, Orthodox : moon, 2014-04-18: Easter, 2014-04-20 Sunday"
+  , "2015, Gregorian: moon, 2015-04-03: Easter, 2015-04-05 Sunday"
+  , "2015, Orthodox : moon, 2015-04-07: Easter, 2015-04-12 Sunday"
+  , "2016, Gregorian: moon, 2016-03-23: Easter, 2016-03-27 Sunday"
+  , "2016, Orthodox : moon, 2016-04-26: Easter, 2016-05-01 Sunday"
+  , "2017, Gregorian: moon, 2017-04-11: Easter, 2017-04-16 Sunday"
+  , "2017, Orthodox : moon, 2017-04-15: Easter, 2017-04-16 Sunday"
+  , "2018, Gregorian: moon, 2018-03-31: Easter, 2018-04-01 Sunday"
+  , "2018, Orthodox : moon, 2018-04-04: Easter, 2018-04-08 Sunday"
+  , "2019, Gregorian: moon, 2019-04-18: Easter, 2019-04-21 Sunday"
+  , "2019, Orthodox : moon, 2019-04-23: Easter, 2019-04-28 Sunday"
+  , "2020, Gregorian: moon, 2020-04-08: Easter, 2020-04-12 Sunday"
+  , "2020, Orthodox : moon, 2020-04-12: Easter, 2020-04-19 Sunday" ]
diff --git a/test/main/Test/Calendar/LongWeekYears.hs b/test/main/Test/Calendar/LongWeekYears.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/LongWeekYears.hs
@@ -0,0 +1,22 @@
+module Test.Calendar.LongWeekYears(longWeekYears) where
+
+import Data.Time.Calendar.WeekDate.Compat
+import Data.Time.Calendar.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Calendar.LongWeekYearsRef
+
+longYear :: Integer -> Bool
+longYear year = case toWeekDate (fromGregorian year 12 31) of
+    (_,53,_) -> True
+    _ -> False
+
+showLongYear :: Integer -> String
+showLongYear year
+  = unwords [ show year ++ ":"
+            , (if isLeapYear year then "L" else " ") ++ (if longYear year then "*" else " ") ]
+
+longWeekYears :: TestTree
+longWeekYears = testCase "longWeekYears" $
+    assertEqual "" longWeekYearsRef $ unlines $ map showLongYear [1901 .. 2050]
diff --git a/test/main/Test/Calendar/LongWeekYearsRef.hs b/test/main/Test/Calendar/LongWeekYearsRef.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/LongWeekYearsRef.hs
@@ -0,0 +1,155 @@
+module Test.Calendar.LongWeekYearsRef where
+
+longWeekYearsRef :: String
+longWeekYearsRef =
+ unlines
+  [ "1901:   "
+  , "1902:   "
+  , "1903:  *"
+  , "1904: L "
+  , "1905:   "
+  , "1906:   "
+  , "1907:   "
+  , "1908: L*"
+  , "1909:   "
+  , "1910:   "
+  , "1911:   "
+  , "1912: L "
+  , "1913:   "
+  , "1914:  *"
+  , "1915:   "
+  , "1916: L "
+  , "1917:   "
+  , "1918:   "
+  , "1919:   "
+  , "1920: L*"
+  , "1921:   "
+  , "1922:   "
+  , "1923:   "
+  , "1924: L "
+  , "1925:  *"
+  , "1926:   "
+  , "1927:   "
+  , "1928: L "
+  , "1929:   "
+  , "1930:   "
+  , "1931:  *"
+  , "1932: L "
+  , "1933:   "
+  , "1934:   "
+  , "1935:   "
+  , "1936: L*"
+  , "1937:   "
+  , "1938:   "
+  , "1939:   "
+  , "1940: L "
+  , "1941:   "
+  , "1942:  *"
+  , "1943:   "
+  , "1944: L "
+  , "1945:   "
+  , "1946:   "
+  , "1947:   "
+  , "1948: L*"
+  , "1949:   "
+  , "1950:   "
+  , "1951:   "
+  , "1952: L "
+  , "1953:  *"
+  , "1954:   "
+  , "1955:   "
+  , "1956: L "
+  , "1957:   "
+  , "1958:   "
+  , "1959:  *"
+  , "1960: L "
+  , "1961:   "
+  , "1962:   "
+  , "1963:   "
+  , "1964: L*"
+  , "1965:   "
+  , "1966:   "
+  , "1967:   "
+  , "1968: L "
+  , "1969:   "
+  , "1970:  *"
+  , "1971:   "
+  , "1972: L "
+  , "1973:   "
+  , "1974:   "
+  , "1975:   "
+  , "1976: L*"
+  , "1977:   "
+  , "1978:   "
+  , "1979:   "
+  , "1980: L "
+  , "1981:  *"
+  , "1982:   "
+  , "1983:   "
+  , "1984: L "
+  , "1985:   "
+  , "1986:   "
+  , "1987:  *"
+  , "1988: L "
+  , "1989:   "
+  , "1990:   "
+  , "1991:   "
+  , "1992: L*"
+  , "1993:   "
+  , "1994:   "
+  , "1995:   "
+  , "1996: L "
+  , "1997:   "
+  , "1998:  *"
+  , "1999:   "
+  , "2000: L "
+  , "2001:   "
+  , "2002:   "
+  , "2003:   "
+  , "2004: L*"
+  , "2005:   "
+  , "2006:   "
+  , "2007:   "
+  , "2008: L "
+  , "2009:  *"
+  , "2010:   "
+  , "2011:   "
+  , "2012: L "
+  , "2013:   "
+  , "2014:   "
+  , "2015:  *"
+  , "2016: L "
+  , "2017:   "
+  , "2018:   "
+  , "2019:   "
+  , "2020: L*"
+  , "2021:   "
+  , "2022:   "
+  , "2023:   "
+  , "2024: L "
+  , "2025:   "
+  , "2026:  *"
+  , "2027:   "
+  , "2028: L "
+  , "2029:   "
+  , "2030:   "
+  , "2031:   "
+  , "2032: L*"
+  , "2033:   "
+  , "2034:   "
+  , "2035:   "
+  , "2036: L "
+  , "2037:  *"
+  , "2038:   "
+  , "2039:   "
+  , "2040: L "
+  , "2041:   "
+  , "2042:   "
+  , "2043:  *"
+  , "2044: L "
+  , "2045:   "
+  , "2046:   "
+  , "2047:   "
+  , "2048: L*"
+  , "2049:   "
+  , "2050:   " ]
diff --git a/test/main/Test/Calendar/MonthDay.hs b/test/main/Test/Calendar/MonthDay.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/MonthDay.hs
@@ -0,0 +1,24 @@
+module Test.Calendar.MonthDay(testMonthDay) where
+
+import Data.Time.Calendar.MonthDay.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Calendar.MonthDayRef
+
+showCompare :: (Eq a,Show a) => a -> String -> a -> String
+showCompare a1 b a2 | a1 == a2 = (show a1) ++ " == " ++ b
+showCompare a1 b a2 = "DIFF: " ++ (show a1) ++ " -> " ++ b ++ " -> " ++ (show a2)
+
+testMonthDay :: TestTree
+testMonthDay = testCase "testMonthDay" $
+    assertEqual "" testMonthDayRef $ concat $ map (\isL -> unlines (leap isL : yearDays isL)) [False,True]
+    where
+        leap isLeap = if isLeap then "Leap:" else "Regular:"
+        yearDays isLeap =
+            map (\yd -> let
+                (m,d)  = dayOfYearToMonthAndDay isLeap yd
+                yd'    = monthAndDayToDayOfYear isLeap m d
+                mdtext = show m ++ "-" ++ show d
+            in showCompare yd mdtext yd')
+            [-2..369]
diff --git a/test/main/Test/Calendar/MonthDayRef.hs b/test/main/Test/Calendar/MonthDayRef.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/MonthDayRef.hs
@@ -0,0 +1,751 @@
+module Test.Calendar.MonthDayRef where
+
+testMonthDayRef :: String
+testMonthDayRef =
+ unlines
+  [ "Regular:"
+  , "DIFF: -2 -> 1-1 -> 1"
+  , "DIFF: -1 -> 1-1 -> 1"
+  , "DIFF: 0 -> 1-1 -> 1"
+  , "1 == 1-1"
+  , "2 == 1-2"
+  , "3 == 1-3"
+  , "4 == 1-4"
+  , "5 == 1-5"
+  , "6 == 1-6"
+  , "7 == 1-7"
+  , "8 == 1-8"
+  , "9 == 1-9"
+  , "10 == 1-10"
+  , "11 == 1-11"
+  , "12 == 1-12"
+  , "13 == 1-13"
+  , "14 == 1-14"
+  , "15 == 1-15"
+  , "16 == 1-16"
+  , "17 == 1-17"
+  , "18 == 1-18"
+  , "19 == 1-19"
+  , "20 == 1-20"
+  , "21 == 1-21"
+  , "22 == 1-22"
+  , "23 == 1-23"
+  , "24 == 1-24"
+  , "25 == 1-25"
+  , "26 == 1-26"
+  , "27 == 1-27"
+  , "28 == 1-28"
+  , "29 == 1-29"
+  , "30 == 1-30"
+  , "31 == 1-31"
+  , "32 == 2-1"
+  , "33 == 2-2"
+  , "34 == 2-3"
+  , "35 == 2-4"
+  , "36 == 2-5"
+  , "37 == 2-6"
+  , "38 == 2-7"
+  , "39 == 2-8"
+  , "40 == 2-9"
+  , "41 == 2-10"
+  , "42 == 2-11"
+  , "43 == 2-12"
+  , "44 == 2-13"
+  , "45 == 2-14"
+  , "46 == 2-15"
+  , "47 == 2-16"
+  , "48 == 2-17"
+  , "49 == 2-18"
+  , "50 == 2-19"
+  , "51 == 2-20"
+  , "52 == 2-21"
+  , "53 == 2-22"
+  , "54 == 2-23"
+  , "55 == 2-24"
+  , "56 == 2-25"
+  , "57 == 2-26"
+  , "58 == 2-27"
+  , "59 == 2-28"
+  , "60 == 3-1"
+  , "61 == 3-2"
+  , "62 == 3-3"
+  , "63 == 3-4"
+  , "64 == 3-5"
+  , "65 == 3-6"
+  , "66 == 3-7"
+  , "67 == 3-8"
+  , "68 == 3-9"
+  , "69 == 3-10"
+  , "70 == 3-11"
+  , "71 == 3-12"
+  , "72 == 3-13"
+  , "73 == 3-14"
+  , "74 == 3-15"
+  , "75 == 3-16"
+  , "76 == 3-17"
+  , "77 == 3-18"
+  , "78 == 3-19"
+  , "79 == 3-20"
+  , "80 == 3-21"
+  , "81 == 3-22"
+  , "82 == 3-23"
+  , "83 == 3-24"
+  , "84 == 3-25"
+  , "85 == 3-26"
+  , "86 == 3-27"
+  , "87 == 3-28"
+  , "88 == 3-29"
+  , "89 == 3-30"
+  , "90 == 3-31"
+  , "91 == 4-1"
+  , "92 == 4-2"
+  , "93 == 4-3"
+  , "94 == 4-4"
+  , "95 == 4-5"
+  , "96 == 4-6"
+  , "97 == 4-7"
+  , "98 == 4-8"
+  , "99 == 4-9"
+  , "100 == 4-10"
+  , "101 == 4-11"
+  , "102 == 4-12"
+  , "103 == 4-13"
+  , "104 == 4-14"
+  , "105 == 4-15"
+  , "106 == 4-16"
+  , "107 == 4-17"
+  , "108 == 4-18"
+  , "109 == 4-19"
+  , "110 == 4-20"
+  , "111 == 4-21"
+  , "112 == 4-22"
+  , "113 == 4-23"
+  , "114 == 4-24"
+  , "115 == 4-25"
+  , "116 == 4-26"
+  , "117 == 4-27"
+  , "118 == 4-28"
+  , "119 == 4-29"
+  , "120 == 4-30"
+  , "121 == 5-1"
+  , "122 == 5-2"
+  , "123 == 5-3"
+  , "124 == 5-4"
+  , "125 == 5-5"
+  , "126 == 5-6"
+  , "127 == 5-7"
+  , "128 == 5-8"
+  , "129 == 5-9"
+  , "130 == 5-10"
+  , "131 == 5-11"
+  , "132 == 5-12"
+  , "133 == 5-13"
+  , "134 == 5-14"
+  , "135 == 5-15"
+  , "136 == 5-16"
+  , "137 == 5-17"
+  , "138 == 5-18"
+  , "139 == 5-19"
+  , "140 == 5-20"
+  , "141 == 5-21"
+  , "142 == 5-22"
+  , "143 == 5-23"
+  , "144 == 5-24"
+  , "145 == 5-25"
+  , "146 == 5-26"
+  , "147 == 5-27"
+  , "148 == 5-28"
+  , "149 == 5-29"
+  , "150 == 5-30"
+  , "151 == 5-31"
+  , "152 == 6-1"
+  , "153 == 6-2"
+  , "154 == 6-3"
+  , "155 == 6-4"
+  , "156 == 6-5"
+  , "157 == 6-6"
+  , "158 == 6-7"
+  , "159 == 6-8"
+  , "160 == 6-9"
+  , "161 == 6-10"
+  , "162 == 6-11"
+  , "163 == 6-12"
+  , "164 == 6-13"
+  , "165 == 6-14"
+  , "166 == 6-15"
+  , "167 == 6-16"
+  , "168 == 6-17"
+  , "169 == 6-18"
+  , "170 == 6-19"
+  , "171 == 6-20"
+  , "172 == 6-21"
+  , "173 == 6-22"
+  , "174 == 6-23"
+  , "175 == 6-24"
+  , "176 == 6-25"
+  , "177 == 6-26"
+  , "178 == 6-27"
+  , "179 == 6-28"
+  , "180 == 6-29"
+  , "181 == 6-30"
+  , "182 == 7-1"
+  , "183 == 7-2"
+  , "184 == 7-3"
+  , "185 == 7-4"
+  , "186 == 7-5"
+  , "187 == 7-6"
+  , "188 == 7-7"
+  , "189 == 7-8"
+  , "190 == 7-9"
+  , "191 == 7-10"
+  , "192 == 7-11"
+  , "193 == 7-12"
+  , "194 == 7-13"
+  , "195 == 7-14"
+  , "196 == 7-15"
+  , "197 == 7-16"
+  , "198 == 7-17"
+  , "199 == 7-18"
+  , "200 == 7-19"
+  , "201 == 7-20"
+  , "202 == 7-21"
+  , "203 == 7-22"
+  , "204 == 7-23"
+  , "205 == 7-24"
+  , "206 == 7-25"
+  , "207 == 7-26"
+  , "208 == 7-27"
+  , "209 == 7-28"
+  , "210 == 7-29"
+  , "211 == 7-30"
+  , "212 == 7-31"
+  , "213 == 8-1"
+  , "214 == 8-2"
+  , "215 == 8-3"
+  , "216 == 8-4"
+  , "217 == 8-5"
+  , "218 == 8-6"
+  , "219 == 8-7"
+  , "220 == 8-8"
+  , "221 == 8-9"
+  , "222 == 8-10"
+  , "223 == 8-11"
+  , "224 == 8-12"
+  , "225 == 8-13"
+  , "226 == 8-14"
+  , "227 == 8-15"
+  , "228 == 8-16"
+  , "229 == 8-17"
+  , "230 == 8-18"
+  , "231 == 8-19"
+  , "232 == 8-20"
+  , "233 == 8-21"
+  , "234 == 8-22"
+  , "235 == 8-23"
+  , "236 == 8-24"
+  , "237 == 8-25"
+  , "238 == 8-26"
+  , "239 == 8-27"
+  , "240 == 8-28"
+  , "241 == 8-29"
+  , "242 == 8-30"
+  , "243 == 8-31"
+  , "244 == 9-1"
+  , "245 == 9-2"
+  , "246 == 9-3"
+  , "247 == 9-4"
+  , "248 == 9-5"
+  , "249 == 9-6"
+  , "250 == 9-7"
+  , "251 == 9-8"
+  , "252 == 9-9"
+  , "253 == 9-10"
+  , "254 == 9-11"
+  , "255 == 9-12"
+  , "256 == 9-13"
+  , "257 == 9-14"
+  , "258 == 9-15"
+  , "259 == 9-16"
+  , "260 == 9-17"
+  , "261 == 9-18"
+  , "262 == 9-19"
+  , "263 == 9-20"
+  , "264 == 9-21"
+  , "265 == 9-22"
+  , "266 == 9-23"
+  , "267 == 9-24"
+  , "268 == 9-25"
+  , "269 == 9-26"
+  , "270 == 9-27"
+  , "271 == 9-28"
+  , "272 == 9-29"
+  , "273 == 9-30"
+  , "274 == 10-1"
+  , "275 == 10-2"
+  , "276 == 10-3"
+  , "277 == 10-4"
+  , "278 == 10-5"
+  , "279 == 10-6"
+  , "280 == 10-7"
+  , "281 == 10-8"
+  , "282 == 10-9"
+  , "283 == 10-10"
+  , "284 == 10-11"
+  , "285 == 10-12"
+  , "286 == 10-13"
+  , "287 == 10-14"
+  , "288 == 10-15"
+  , "289 == 10-16"
+  , "290 == 10-17"
+  , "291 == 10-18"
+  , "292 == 10-19"
+  , "293 == 10-20"
+  , "294 == 10-21"
+  , "295 == 10-22"
+  , "296 == 10-23"
+  , "297 == 10-24"
+  , "298 == 10-25"
+  , "299 == 10-26"
+  , "300 == 10-27"
+  , "301 == 10-28"
+  , "302 == 10-29"
+  , "303 == 10-30"
+  , "304 == 10-31"
+  , "305 == 11-1"
+  , "306 == 11-2"
+  , "307 == 11-3"
+  , "308 == 11-4"
+  , "309 == 11-5"
+  , "310 == 11-6"
+  , "311 == 11-7"
+  , "312 == 11-8"
+  , "313 == 11-9"
+  , "314 == 11-10"
+  , "315 == 11-11"
+  , "316 == 11-12"
+  , "317 == 11-13"
+  , "318 == 11-14"
+  , "319 == 11-15"
+  , "320 == 11-16"
+  , "321 == 11-17"
+  , "322 == 11-18"
+  , "323 == 11-19"
+  , "324 == 11-20"
+  , "325 == 11-21"
+  , "326 == 11-22"
+  , "327 == 11-23"
+  , "328 == 11-24"
+  , "329 == 11-25"
+  , "330 == 11-26"
+  , "331 == 11-27"
+  , "332 == 11-28"
+  , "333 == 11-29"
+  , "334 == 11-30"
+  , "335 == 12-1"
+  , "336 == 12-2"
+  , "337 == 12-3"
+  , "338 == 12-4"
+  , "339 == 12-5"
+  , "340 == 12-6"
+  , "341 == 12-7"
+  , "342 == 12-8"
+  , "343 == 12-9"
+  , "344 == 12-10"
+  , "345 == 12-11"
+  , "346 == 12-12"
+  , "347 == 12-13"
+  , "348 == 12-14"
+  , "349 == 12-15"
+  , "350 == 12-16"
+  , "351 == 12-17"
+  , "352 == 12-18"
+  , "353 == 12-19"
+  , "354 == 12-20"
+  , "355 == 12-21"
+  , "356 == 12-22"
+  , "357 == 12-23"
+  , "358 == 12-24"
+  , "359 == 12-25"
+  , "360 == 12-26"
+  , "361 == 12-27"
+  , "362 == 12-28"
+  , "363 == 12-29"
+  , "364 == 12-30"
+  , "365 == 12-31"
+  , "DIFF: 366 -> 12-31 -> 365"
+  , "DIFF: 367 -> 12-31 -> 365"
+  , "DIFF: 368 -> 12-31 -> 365"
+  , "DIFF: 369 -> 12-31 -> 365"
+  , "Leap:"
+  , "DIFF: -2 -> 1-1 -> 1"
+  , "DIFF: -1 -> 1-1 -> 1"
+  , "DIFF: 0 -> 1-1 -> 1"
+  , "1 == 1-1"
+  , "2 == 1-2"
+  , "3 == 1-3"
+  , "4 == 1-4"
+  , "5 == 1-5"
+  , "6 == 1-6"
+  , "7 == 1-7"
+  , "8 == 1-8"
+  , "9 == 1-9"
+  , "10 == 1-10"
+  , "11 == 1-11"
+  , "12 == 1-12"
+  , "13 == 1-13"
+  , "14 == 1-14"
+  , "15 == 1-15"
+  , "16 == 1-16"
+  , "17 == 1-17"
+  , "18 == 1-18"
+  , "19 == 1-19"
+  , "20 == 1-20"
+  , "21 == 1-21"
+  , "22 == 1-22"
+  , "23 == 1-23"
+  , "24 == 1-24"
+  , "25 == 1-25"
+  , "26 == 1-26"
+  , "27 == 1-27"
+  , "28 == 1-28"
+  , "29 == 1-29"
+  , "30 == 1-30"
+  , "31 == 1-31"
+  , "32 == 2-1"
+  , "33 == 2-2"
+  , "34 == 2-3"
+  , "35 == 2-4"
+  , "36 == 2-5"
+  , "37 == 2-6"
+  , "38 == 2-7"
+  , "39 == 2-8"
+  , "40 == 2-9"
+  , "41 == 2-10"
+  , "42 == 2-11"
+  , "43 == 2-12"
+  , "44 == 2-13"
+  , "45 == 2-14"
+  , "46 == 2-15"
+  , "47 == 2-16"
+  , "48 == 2-17"
+  , "49 == 2-18"
+  , "50 == 2-19"
+  , "51 == 2-20"
+  , "52 == 2-21"
+  , "53 == 2-22"
+  , "54 == 2-23"
+  , "55 == 2-24"
+  , "56 == 2-25"
+  , "57 == 2-26"
+  , "58 == 2-27"
+  , "59 == 2-28"
+  , "60 == 2-29"
+  , "61 == 3-1"
+  , "62 == 3-2"
+  , "63 == 3-3"
+  , "64 == 3-4"
+  , "65 == 3-5"
+  , "66 == 3-6"
+  , "67 == 3-7"
+  , "68 == 3-8"
+  , "69 == 3-9"
+  , "70 == 3-10"
+  , "71 == 3-11"
+  , "72 == 3-12"
+  , "73 == 3-13"
+  , "74 == 3-14"
+  , "75 == 3-15"
+  , "76 == 3-16"
+  , "77 == 3-17"
+  , "78 == 3-18"
+  , "79 == 3-19"
+  , "80 == 3-20"
+  , "81 == 3-21"
+  , "82 == 3-22"
+  , "83 == 3-23"
+  , "84 == 3-24"
+  , "85 == 3-25"
+  , "86 == 3-26"
+  , "87 == 3-27"
+  , "88 == 3-28"
+  , "89 == 3-29"
+  , "90 == 3-30"
+  , "91 == 3-31"
+  , "92 == 4-1"
+  , "93 == 4-2"
+  , "94 == 4-3"
+  , "95 == 4-4"
+  , "96 == 4-5"
+  , "97 == 4-6"
+  , "98 == 4-7"
+  , "99 == 4-8"
+  , "100 == 4-9"
+  , "101 == 4-10"
+  , "102 == 4-11"
+  , "103 == 4-12"
+  , "104 == 4-13"
+  , "105 == 4-14"
+  , "106 == 4-15"
+  , "107 == 4-16"
+  , "108 == 4-17"
+  , "109 == 4-18"
+  , "110 == 4-19"
+  , "111 == 4-20"
+  , "112 == 4-21"
+  , "113 == 4-22"
+  , "114 == 4-23"
+  , "115 == 4-24"
+  , "116 == 4-25"
+  , "117 == 4-26"
+  , "118 == 4-27"
+  , "119 == 4-28"
+  , "120 == 4-29"
+  , "121 == 4-30"
+  , "122 == 5-1"
+  , "123 == 5-2"
+  , "124 == 5-3"
+  , "125 == 5-4"
+  , "126 == 5-5"
+  , "127 == 5-6"
+  , "128 == 5-7"
+  , "129 == 5-8"
+  , "130 == 5-9"
+  , "131 == 5-10"
+  , "132 == 5-11"
+  , "133 == 5-12"
+  , "134 == 5-13"
+  , "135 == 5-14"
+  , "136 == 5-15"
+  , "137 == 5-16"
+  , "138 == 5-17"
+  , "139 == 5-18"
+  , "140 == 5-19"
+  , "141 == 5-20"
+  , "142 == 5-21"
+  , "143 == 5-22"
+  , "144 == 5-23"
+  , "145 == 5-24"
+  , "146 == 5-25"
+  , "147 == 5-26"
+  , "148 == 5-27"
+  , "149 == 5-28"
+  , "150 == 5-29"
+  , "151 == 5-30"
+  , "152 == 5-31"
+  , "153 == 6-1"
+  , "154 == 6-2"
+  , "155 == 6-3"
+  , "156 == 6-4"
+  , "157 == 6-5"
+  , "158 == 6-6"
+  , "159 == 6-7"
+  , "160 == 6-8"
+  , "161 == 6-9"
+  , "162 == 6-10"
+  , "163 == 6-11"
+  , "164 == 6-12"
+  , "165 == 6-13"
+  , "166 == 6-14"
+  , "167 == 6-15"
+  , "168 == 6-16"
+  , "169 == 6-17"
+  , "170 == 6-18"
+  , "171 == 6-19"
+  , "172 == 6-20"
+  , "173 == 6-21"
+  , "174 == 6-22"
+  , "175 == 6-23"
+  , "176 == 6-24"
+  , "177 == 6-25"
+  , "178 == 6-26"
+  , "179 == 6-27"
+  , "180 == 6-28"
+  , "181 == 6-29"
+  , "182 == 6-30"
+  , "183 == 7-1"
+  , "184 == 7-2"
+  , "185 == 7-3"
+  , "186 == 7-4"
+  , "187 == 7-5"
+  , "188 == 7-6"
+  , "189 == 7-7"
+  , "190 == 7-8"
+  , "191 == 7-9"
+  , "192 == 7-10"
+  , "193 == 7-11"
+  , "194 == 7-12"
+  , "195 == 7-13"
+  , "196 == 7-14"
+  , "197 == 7-15"
+  , "198 == 7-16"
+  , "199 == 7-17"
+  , "200 == 7-18"
+  , "201 == 7-19"
+  , "202 == 7-20"
+  , "203 == 7-21"
+  , "204 == 7-22"
+  , "205 == 7-23"
+  , "206 == 7-24"
+  , "207 == 7-25"
+  , "208 == 7-26"
+  , "209 == 7-27"
+  , "210 == 7-28"
+  , "211 == 7-29"
+  , "212 == 7-30"
+  , "213 == 7-31"
+  , "214 == 8-1"
+  , "215 == 8-2"
+  , "216 == 8-3"
+  , "217 == 8-4"
+  , "218 == 8-5"
+  , "219 == 8-6"
+  , "220 == 8-7"
+  , "221 == 8-8"
+  , "222 == 8-9"
+  , "223 == 8-10"
+  , "224 == 8-11"
+  , "225 == 8-12"
+  , "226 == 8-13"
+  , "227 == 8-14"
+  , "228 == 8-15"
+  , "229 == 8-16"
+  , "230 == 8-17"
+  , "231 == 8-18"
+  , "232 == 8-19"
+  , "233 == 8-20"
+  , "234 == 8-21"
+  , "235 == 8-22"
+  , "236 == 8-23"
+  , "237 == 8-24"
+  , "238 == 8-25"
+  , "239 == 8-26"
+  , "240 == 8-27"
+  , "241 == 8-28"
+  , "242 == 8-29"
+  , "243 == 8-30"
+  , "244 == 8-31"
+  , "245 == 9-1"
+  , "246 == 9-2"
+  , "247 == 9-3"
+  , "248 == 9-4"
+  , "249 == 9-5"
+  , "250 == 9-6"
+  , "251 == 9-7"
+  , "252 == 9-8"
+  , "253 == 9-9"
+  , "254 == 9-10"
+  , "255 == 9-11"
+  , "256 == 9-12"
+  , "257 == 9-13"
+  , "258 == 9-14"
+  , "259 == 9-15"
+  , "260 == 9-16"
+  , "261 == 9-17"
+  , "262 == 9-18"
+  , "263 == 9-19"
+  , "264 == 9-20"
+  , "265 == 9-21"
+  , "266 == 9-22"
+  , "267 == 9-23"
+  , "268 == 9-24"
+  , "269 == 9-25"
+  , "270 == 9-26"
+  , "271 == 9-27"
+  , "272 == 9-28"
+  , "273 == 9-29"
+  , "274 == 9-30"
+  , "275 == 10-1"
+  , "276 == 10-2"
+  , "277 == 10-3"
+  , "278 == 10-4"
+  , "279 == 10-5"
+  , "280 == 10-6"
+  , "281 == 10-7"
+  , "282 == 10-8"
+  , "283 == 10-9"
+  , "284 == 10-10"
+  , "285 == 10-11"
+  , "286 == 10-12"
+  , "287 == 10-13"
+  , "288 == 10-14"
+  , "289 == 10-15"
+  , "290 == 10-16"
+  , "291 == 10-17"
+  , "292 == 10-18"
+  , "293 == 10-19"
+  , "294 == 10-20"
+  , "295 == 10-21"
+  , "296 == 10-22"
+  , "297 == 10-23"
+  , "298 == 10-24"
+  , "299 == 10-25"
+  , "300 == 10-26"
+  , "301 == 10-27"
+  , "302 == 10-28"
+  , "303 == 10-29"
+  , "304 == 10-30"
+  , "305 == 10-31"
+  , "306 == 11-1"
+  , "307 == 11-2"
+  , "308 == 11-3"
+  , "309 == 11-4"
+  , "310 == 11-5"
+  , "311 == 11-6"
+  , "312 == 11-7"
+  , "313 == 11-8"
+  , "314 == 11-9"
+  , "315 == 11-10"
+  , "316 == 11-11"
+  , "317 == 11-12"
+  , "318 == 11-13"
+  , "319 == 11-14"
+  , "320 == 11-15"
+  , "321 == 11-16"
+  , "322 == 11-17"
+  , "323 == 11-18"
+  , "324 == 11-19"
+  , "325 == 11-20"
+  , "326 == 11-21"
+  , "327 == 11-22"
+  , "328 == 11-23"
+  , "329 == 11-24"
+  , "330 == 11-25"
+  , "331 == 11-26"
+  , "332 == 11-27"
+  , "333 == 11-28"
+  , "334 == 11-29"
+  , "335 == 11-30"
+  , "336 == 12-1"
+  , "337 == 12-2"
+  , "338 == 12-3"
+  , "339 == 12-4"
+  , "340 == 12-5"
+  , "341 == 12-6"
+  , "342 == 12-7"
+  , "343 == 12-8"
+  , "344 == 12-9"
+  , "345 == 12-10"
+  , "346 == 12-11"
+  , "347 == 12-12"
+  , "348 == 12-13"
+  , "349 == 12-14"
+  , "350 == 12-15"
+  , "351 == 12-16"
+  , "352 == 12-17"
+  , "353 == 12-18"
+  , "354 == 12-19"
+  , "355 == 12-20"
+  , "356 == 12-21"
+  , "357 == 12-22"
+  , "358 == 12-23"
+  , "359 == 12-24"
+  , "360 == 12-25"
+  , "361 == 12-26"
+  , "362 == 12-27"
+  , "363 == 12-28"
+  , "364 == 12-29"
+  , "365 == 12-30"
+  , "366 == 12-31"
+  , "DIFF: 367 -> 12-31 -> 366"
+  , "DIFF: 368 -> 12-31 -> 366"
+  , "DIFF: 369 -> 12-31 -> 366" ]
diff --git a/test/main/Test/Calendar/Valid.hs b/test/main/Test/Calendar/Valid.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/Valid.hs
@@ -0,0 +1,96 @@
+module Test.Calendar.Valid(testValid) where
+
+import Data.Time.Compat
+import Data.Time.Calendar.OrdinalDate.Compat
+import Data.Time.Calendar.WeekDate.Compat
+import Data.Time.Calendar.Julian.Compat
+
+import Test.Tasty
+import Test.Tasty.QuickCheck hiding (reason)
+import Test.QuickCheck.Property
+
+
+validResult :: (Eq c,Show c,Eq t,Show t) =>
+    (s -> c) -> Bool -> (t -> c) -> (c -> t) -> (c -> Maybe t) -> s -> Result
+validResult sc valid toComponents fromComponents fromComponentsValid s = let
+    c = sc s
+    mt = fromComponentsValid c
+    t' = fromComponents c
+    c' = toComponents t'
+    in if valid then
+        case mt of
+            Nothing -> rejected
+            Just t -> if t' /= t
+                then failed {reason = "'fromValid' gives " ++ show t ++ ", but 'from' gives " ++ show t'}
+                else if c' /= c
+                then failed {reason = "found valid, but converts " ++ show c ++ " -> " ++ show t' ++ " -> " ++ show c'}
+                else succeeded
+        else case mt of
+            Nothing -> if c' /= c
+                then succeeded
+                else failed {reason = show c ++ " found invalid, but converts with " ++ show t'}
+            Just _ -> rejected
+
+validTest :: (Arbitrary s,Show s,Eq c,Show c,Eq t,Show t) =>
+    String -> (s -> c) -> (t -> c) -> (c -> t) -> (c -> Maybe t) -> TestTree
+validTest name sc toComponents fromComponents fromComponentsValid = testGroup name
+    [
+    testProperty "valid" $ property $ validResult sc True toComponents fromComponents fromComponentsValid,
+    testProperty "invalid" $ property $ validResult sc False toComponents fromComponents fromComponentsValid
+    ]
+
+toSundayStartWeek :: Day -> (Integer,Int,Int)
+toSundayStartWeek day = let
+    (y,_) = toOrdinalDate day
+    (w,d) = sundayStartWeek day
+    in (y,w,d)
+
+toMondayStartWeek :: Day -> (Integer,Int,Int)
+toMondayStartWeek day = let
+    (y,_) = toOrdinalDate day
+    (w,d) = mondayStartWeek day
+    in (y,w,d)
+
+newtype Year = MkYear Integer deriving (Eq,Show)
+instance Arbitrary Year where
+    arbitrary = fmap MkYear $ choose (-1000,3000)
+
+newtype YearMonth = MkYearMonth Int deriving (Eq,Show)
+instance Arbitrary YearMonth where
+    arbitrary = fmap MkYearMonth $ choose (-5,17)
+
+newtype MonthDay = MkMonthDay Int deriving (Eq,Show)
+instance Arbitrary MonthDay where
+    arbitrary = fmap MkMonthDay $ choose (-5,35)
+
+newtype YearDay = MkYearDay Int deriving (Eq,Show)
+instance Arbitrary YearDay where
+    arbitrary = fmap MkYearDay $ choose (-20,400)
+
+newtype YearWeek = MkYearWeek Int deriving (Eq,Show)
+instance Arbitrary YearWeek where
+    arbitrary = fmap MkYearWeek $ choose (-5,60)
+
+newtype WeekDay = MkWeekDay Int deriving (Eq,Show)
+instance Arbitrary WeekDay where
+    arbitrary = fmap MkWeekDay $ choose (-5,15)
+
+fromYMD :: (Year,YearMonth,MonthDay) -> (Integer,Int,Int)
+fromYMD (MkYear y,MkYearMonth ym,MkMonthDay md) = (y,ym,md)
+
+fromYD :: (Year,YearDay) -> (Integer,Int)
+fromYD (MkYear y,MkYearDay yd) = (y,yd)
+
+fromYWD :: (Year,YearWeek,WeekDay) -> (Integer,Int,Int)
+fromYWD (MkYear y,MkYearWeek yw,MkWeekDay wd) = (y,yw,wd)
+
+testValid :: TestTree
+testValid = testGroup "testValid"
+    [
+    validTest "Gregorian" fromYMD toGregorian (\(y,m,d) -> fromGregorian y m d) (\(y,m,d) -> fromGregorianValid y m d),
+    validTest "OrdinalDate" fromYD toOrdinalDate (\(y,d) -> fromOrdinalDate y d) (\(y,d) -> fromOrdinalDateValid y d),
+    validTest "WeekDate" fromYWD toWeekDate (\(y,w,d) -> fromWeekDate y w d) (\(y,w,d) -> fromWeekDateValid y w d),
+    validTest "SundayStartWeek" fromYWD toSundayStartWeek (\(y,w,d) -> fromSundayStartWeek y w d) (\(y,w,d) -> fromSundayStartWeekValid y w d),
+    validTest "MondayStartWeek" fromYWD toMondayStartWeek (\(y,w,d) -> fromMondayStartWeek y w d) (\(y,w,d) -> fromMondayStartWeekValid y w d),
+    validTest "Julian" fromYMD toJulian (\(y,m,d) -> fromJulian y m d) (\(y,m,d) -> fromJulianValid y m d)
+    ]
diff --git a/test/main/Test/Calendar/Week.hs b/test/main/Test/Calendar/Week.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Calendar/Week.hs
@@ -0,0 +1,94 @@
+module Test.Calendar.Week
+    ( testWeek
+    ) where
+
+import Data.Time.Calendar.Compat
+import Data.Time.Calendar.WeekDate.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+
+testDay :: TestTree
+testDay =
+    testCase "day" $ do
+        let day = fromGregorian 2018 1 9
+        assertEqual "" (ModifiedJulianDay 58127) day
+        assertEqual "" (2018, 2, 2) $ toWeekDate day
+        assertEqual "" Tuesday $ dayOfWeek day
+
+allDaysOfWeek :: [DayOfWeek]
+allDaysOfWeek = [Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday]
+
+testAllDays :: String -> (DayOfWeek -> IO ()) -> TestTree
+testAllDays name f = testGroup name $ fmap (\wd -> testCase (show wd) $ f wd) allDaysOfWeek
+
+testSucc :: TestTree
+testSucc = testAllDays "succ" $ \wd -> assertEqual "" (toEnum $ succ $ fromEnum wd) $ succ wd
+
+testPred :: TestTree
+testPred = testAllDays "pred" $ \wd -> assertEqual "" (toEnum $ pred $ fromEnum wd) $ pred wd
+
+testSequences :: TestTree
+testSequences =
+    testGroup
+        "sequence"
+        [ testCase "[Monday .. Sunday]" $ assertEqual "" allDaysOfWeek [Monday .. Sunday]
+        , testCase "[Wednesday .. Wednesday]" $ assertEqual "" [Wednesday] [Wednesday .. Wednesday]
+        , testCase "[Sunday .. Saturday]" $
+          assertEqual "" [Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday] [Sunday .. Saturday]
+        , testCase "[Thursday .. Wednesday]" $
+          assertEqual "" [Thursday, Friday, Saturday, Sunday, Monday, Tuesday, Wednesday] [Thursday .. Wednesday]
+        , testCase "[Tuesday ..]" $
+          assertEqual
+              ""
+              [ Tuesday
+              , Wednesday
+              , Thursday
+              , Friday
+              , Saturday
+              , Sunday
+              , Monday
+              , Tuesday
+              , Wednesday
+              , Thursday
+              , Friday
+              , Saturday
+              , Sunday
+              , Monday
+              , Tuesday
+              ] $
+          take 15 [Tuesday ..]
+        , testCase "[Wednesday, Tuesday ..]" $
+          assertEqual
+              ""
+              [ Wednesday
+              , Tuesday
+              , Monday
+              , Sunday
+              , Saturday
+              , Friday
+              , Thursday
+              , Wednesday
+              , Tuesday
+              , Monday
+              , Sunday
+              , Saturday
+              , Friday
+              , Thursday
+              , Wednesday
+              ] $
+          take 15 [Wednesday,Tuesday ..]
+        , testCase "[Sunday, Friday ..]" $
+          assertEqual "" [Sunday, Friday, Wednesday, Monday, Saturday, Thursday, Tuesday, Sunday] $
+          take 8 [Sunday,Friday ..]
+        , testCase "[Monday,Sunday .. Tuesday]" $
+          assertEqual "" [Monday, Sunday, Saturday, Friday, Thursday, Wednesday, Tuesday] [Monday,Sunday .. Tuesday]
+        , testCase "[Thursday, Saturday .. Tuesday]" $
+          assertEqual "" [Thursday, Saturday, Monday, Wednesday, Friday, Sunday, Tuesday] [Thursday,Saturday .. Tuesday]
+        ]
+
+testReadShow :: TestTree
+testReadShow = testAllDays "read show" $ \wd -> assertEqual "" wd $ read $ show wd
+
+testWeek :: TestTree
+testWeek = testGroup "Week" [testDay, testSucc, testPred, testSequences, testReadShow]
diff --git a/test/main/Test/Clock/Conversion.hs b/test/main/Test/Clock/Conversion.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Clock/Conversion.hs
@@ -0,0 +1,26 @@
+module Test.Clock.Conversion(testClockConversion) where
+
+import Data.Time.Clock.Compat
+import Data.Time.Clock.System.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+
+
+testClockConversion :: TestTree;
+testClockConversion = testGroup "clock conversion" $ let
+    testPair :: (SystemTime,UTCTime) -> TestTree
+    testPair (st,ut) = testGroup (show ut) $
+        [
+            testCase "systemToUTCTime" $ assertEqual (show ut) ut $ systemToUTCTime st,
+            testCase "utcToSystemTime" $ assertEqual (show ut) st $ utcToSystemTime ut
+        ]
+    in
+    [
+        testPair (MkSystemTime 0 0,UTCTime systemEpochDay 0),
+        testPair (MkSystemTime 86399 0,UTCTime systemEpochDay 86399),
+        testPair (MkSystemTime 86399 999999999,UTCTime systemEpochDay 86399.999999999),
+        testPair (MkSystemTime 86399 1000000000,UTCTime systemEpochDay 86400),
+        testPair (MkSystemTime 86399 1999999999,UTCTime systemEpochDay 86400.999999999),
+        testPair (MkSystemTime 86400 0,UTCTime (succ systemEpochDay) 0)
+    ]
diff --git a/test/main/Test/Clock/Resolution.hs b/test/main/Test/Clock/Resolution.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Clock/Resolution.hs
@@ -0,0 +1,53 @@
+module Test.Clock.Resolution(testResolutions) where
+
+import Data.Time.Clock.Compat
+import Data.Time.Clock.TAI.Compat
+
+import Control.Concurrent
+import Data.Fixed
+import Test.Tasty
+import Test.Tasty.HUnit
+
+repeatN :: Monad m => Int -> m a -> m [a]
+repeatN 0 _ = return []
+repeatN n ma = do
+    a <- ma
+    aa <- repeatN (n - 1) ma
+    return $ a:aa
+
+gcd' :: Real a => a -> a -> a
+gcd' a 0 = a
+gcd' a b = gcd' b (mod' a b)
+
+gcdAll :: Real a => [a] -> a
+gcdAll = foldr gcd' 0
+
+testResolution :: (Show dt,Real dt) => String -> (at -> at -> dt) -> (dt,IO at) -> TestTree
+testResolution name timeDiff (res,getTime) = testCase name $ do
+    t0 <- getTime
+    times0 <- repeatN 100 $ do
+        threadDelay 0
+        getTime
+    times1 <- repeatN 100 $ do -- 100us
+        threadDelay 1 -- 1us
+        getTime
+    times2 <- repeatN 100 $ do -- 1ms
+        threadDelay 10 -- 10us
+        getTime
+    times3 <- repeatN 100 $ do -- 10ms
+        threadDelay 100 -- 100us
+        getTime
+    times4 <- repeatN 100 $ do -- 100ms
+        threadDelay 1000 -- 1ms
+        getTime
+    let times = fmap (\t -> timeDiff t t0) $ times0 ++ times1 ++ times2 ++ times3 ++ times4
+    assertEqual "resolution" res $ gcdAll times
+
+testResolutions :: TestTree
+testResolutions = testGroup "resolution" $
+    [
+    testResolution "getCurrentTime" diffUTCTime (realToFrac getTime_resolution,getCurrentTime)
+    ]
+    ++ case taiClock of
+        Just clock -> [testResolution "taiClock" diffAbsoluteTime clock]
+        Nothing -> []
diff --git a/test/main/Test/Clock/TAI.hs b/test/main/Test/Clock/TAI.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Clock/TAI.hs
@@ -0,0 +1,64 @@
+#
+module Test.Clock.TAI(testTAI) where
+
+import Data.Time.Compat
+import Data.Time.Clock.TAI.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.TestUtil
+
+
+sampleLeapSecondMap :: LeapSecondMap
+sampleLeapSecondMap d | d < fromGregorian 1972 1 1 = Nothing
+sampleLeapSecondMap d | d < fromGregorian 1972 7 1 = Just 10
+sampleLeapSecondMap d | d < fromGregorian 1975 1 1 = Just 11
+sampleLeapSecondMap _ = Nothing
+
+testTAI :: TestTree;
+testTAI = testGroup "leap second transition" $ let
+    dayA = fromGregorian 1972 6 30
+    dayB = fromGregorian 1972 7 1
+
+    utcTime1 = UTCTime dayA 86399
+    utcTime2 = UTCTime dayA 86400
+    utcTime3 = UTCTime dayB 0
+
+    mAbsTime1 = utcToTAITime sampleLeapSecondMap utcTime1
+    mAbsTime2 = utcToTAITime sampleLeapSecondMap utcTime2
+    mAbsTime3 = utcToTAITime sampleLeapSecondMap utcTime3
+    in
+    [
+        testCase "mapping" $ do
+            assertEqual "dayA" (Just 10) $ sampleLeapSecondMap dayA
+            assertEqual "dayB" (Just 11) $ sampleLeapSecondMap dayB
+        ,
+        testCase "day length" $ do
+            assertEqual "dayA" (Just 86401) $ utcDayLength sampleLeapSecondMap dayA
+            assertEqual "dayB" (Just 86400) $ utcDayLength sampleLeapSecondMap dayB
+        ,
+        testCase "differences" $ do
+            absTime1 <- assertJust mAbsTime1
+            absTime2 <- assertJust mAbsTime2
+            absTime3 <- assertJust mAbsTime3
+            assertEqual "absTime2 - absTime1" 1 $ diffAbsoluteTime absTime2 absTime1
+            assertEqual "absTime3 - absTime2" 1 $ diffAbsoluteTime absTime3 absTime2
+        ,
+        testGroup "round-trip"
+        [
+            testCase "1" $ do
+                absTime <- assertJust mAbsTime1
+                utcTime <- assertJust $ taiToUTCTime sampleLeapSecondMap absTime
+                assertEqual "round-trip" utcTime1 utcTime
+            ,
+            testCase "2" $ do
+                absTime <- assertJust mAbsTime2
+                utcTime <- assertJust $ taiToUTCTime sampleLeapSecondMap absTime
+                assertEqual "round-trip" utcTime2 utcTime
+            ,
+            testCase "3" $ do
+                absTime <- assertJust mAbsTime3
+                utcTime <- assertJust $ taiToUTCTime sampleLeapSecondMap absTime
+                assertEqual "round-trip" utcTime3 utcTime
+        ]
+    ]
diff --git a/test/main/Test/Format/Format.hs b/test/main/Test/Format/Format.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Format/Format.hs
@@ -0,0 +1,172 @@
+module Test.Format.Format(testFormat) where
+
+import Data.Time.Compat
+
+import Control.Monad (when)
+import Data.Proxy
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.TestUtil
+
+
+-- as found in http://www.opengroup.org/onlinepubs/007908799/xsh/strftime.html
+-- plus FgGklz
+-- f not supported
+-- P not always supported
+-- s time-zone dependent
+chars :: [Char]
+chars = "aAbBcCdDeFgGhHIjklmMnprRStTuUVwWxXyYzZ%"
+
+-- as found in "man strftime" on a glibc system. '#' is different, though
+modifiers :: [Char]
+modifiers = "_-0^"
+
+widths :: [String]
+widths = ["","1","2","9","12"]
+
+formats :: [String]
+formats =  ["%G-W%V-%u","%U-%w","%W-%u"] ++ (fmap (\char -> '%':[char]) chars)
+ ++ (concat $ fmap (\char -> concat $ fmap (\width -> fmap (\modifier -> "%" ++ [modifier] ++ width ++ [char]) modifiers) widths) chars)
+
+somestrings :: [String]
+somestrings = ["", " ", "-", "\n"]
+
+brokenFormats :: [String]
+brokenFormats =
+    [ "%Z","%_Z","%-Z","%0Z"
+    ,"%4Ez", "%4EZ"
+    ,"%5Ez", "%5EZ"
+    ,"%6Ez", "%6EZ"
+    ,"%Ez", "%EZ"
+    ]
+
+compareExpected :: (Eq t,Show t,ParseTime t) => String -> String -> String -> proxy t -> TestTree
+compareExpected testname fmt str proxy = testCase testname $
+    when (fmt `notElem` brokenFormats) $ do
+        let
+            found :: ParseTime t => proxy t -> Maybe t
+            found _ = parseTimeM False defaultTimeLocale fmt str
+        assertEqual "" Nothing $ found proxy
+
+checkParse :: String -> String -> [TestTree]
+checkParse fmt str = [
+    compareExpected "Day" fmt str (Proxy :: Proxy Day),
+    compareExpected "TimeOfDay" fmt str (Proxy :: Proxy TimeOfDay),
+    compareExpected "LocalTime" fmt str (Proxy :: Proxy LocalTime),
+    compareExpected "TimeZone" fmt str (Proxy :: Proxy TimeZone),
+    compareExpected "UTCTime" fmt str (Proxy :: Proxy UTCTime)
+    ]
+
+testCheckParse :: TestTree
+testCheckParse = testGroup "checkParse" $ tgroup formats $ \fmt -> tgroup somestrings $ \str -> checkParse fmt str
+
+days :: [Day]
+days = [(fromGregorian 2018 1 5) .. (fromGregorian 2018 1 26)]
+
+testDayOfWeek :: TestTree
+testDayOfWeek  = testGroup "DayOfWeek" $ tgroup "uwaA" $ \fmt -> tgroup days $ \day -> let
+    dayFormat = formatTime defaultTimeLocale ['%',fmt] day
+    dowFormat = formatTime defaultTimeLocale ['%',fmt] $ dayOfWeek day
+    in assertEqual "" dayFormat dowFormat
+
+{-
+testZone :: String -> String -> Int -> TestTree
+testZone fmt expected minutes = testCase (show fmt) $ assertEqual "" expected $ formatTime defaultTimeLocale fmt $ TimeZone minutes False ""
+
+testZonePair :: String -> String -> Int -> TestTree
+testZonePair mods expected minutes = testGroup (show mods ++ " " ++ show minutes)
+    [
+        testZone ("%" ++ mods ++ "z") expected minutes,
+        testZone ("%" ++ mods ++ "Z") expected minutes
+    ]
+
+testTimeZone :: TestTree
+testTimeZone = testGroup "TimeZone"
+    [
+    testZonePair "" "+0000" 0,
+    testZonePair "E" "+00:00" 0,
+    testZonePair "" "+0500" 300,
+    testZonePair "E" "+05:00" 300,
+    testZonePair "3" "+0500" 300,
+    testZonePair "4E" "+05:00" 300,
+    testZonePair "4" "+0500" 300,
+    testZonePair "5E" "+05:00" 300,
+    testZonePair "5" "+00500" 300,
+    testZonePair "6E" "+005:00" 300,
+    testZonePair "" "-0700" (-420),
+    testZonePair "E" "-07:00" (-420),
+    testZonePair "" "+1015" 615,
+    testZonePair "E" "+10:15" 615,
+    testZonePair "3" "+1015" 615,
+    testZonePair "4E" "+10:15" 615,
+    testZonePair "4" "+1015" 615,
+    testZonePair "5E" "+10:15" 615,
+    testZonePair "5" "+01015" 615,
+    testZonePair "6E" "+010:15" 615,
+    testZonePair "" "-1130" (-690),
+    testZonePair "E" "-11:30" (-690)
+    ]
+
+testAFormat :: FormatTime t => String -> String -> t -> TestTree
+testAFormat fmt expected t = testCase fmt $ assertEqual "" expected $ formatTime defaultTimeLocale fmt t
+
+testNominalDiffTime :: TestTree
+testNominalDiffTime = testGroup "NominalDiffTime"
+    [
+        testAFormat "%ww%Dd%Hh%Mm%ESs" "3w2d2h22m8.21s" $ (fromRational $ 23 * 86400 + 8528.21 :: NominalDiffTime),
+        testAFormat "%dd %hh %mm %ss %Ess" "0d 0h 0m 0s 0.74s" $ (fromRational $ 0.74 :: NominalDiffTime),
+        testAFormat "%dd %hh %mm %ss %Ess" "0d 0h 0m 0s -0.74s" $ (fromRational $ negate $ 0.74 :: NominalDiffTime),
+        testAFormat "%dd %hh %mm %ss %Ess %0Ess" "23d 554h 33262m 1995728s 1995728.21s 1995728.210000000000s" $ (fromRational $ 23 * 86400 + 8528.21 :: NominalDiffTime),
+        testAFormat "%ww%Dd%Hh%Mm%Ss" "-3w-2d-2h-22m-8s" $ (fromRational $ negate $ 23 * 86400 + 8528.21 :: NominalDiffTime),
+        testAFormat "%ww%Dd%Hh%Mm%ESs" "-3w-2d-2h-22m-8.21s" $ (fromRational $ negate $ 23 * 86400 + 8528.21 :: NominalDiffTime),
+        testAFormat "%ww%Dd%Hh%Mm%Ss" "-3w-2d-2h-22m0s" $ (fromRational $ negate $ 23 * 86400 + 8520.21 :: NominalDiffTime),
+        testAFormat "%ww%Dd%Hh%Mm%ESs" "-3w-2d-2h-22m-0.21s" $ (fromRational $ negate $ 23 * 86400 + 8520.21 :: NominalDiffTime),
+        testAFormat "%dd %hh %mm %Ess" "-23d -554h -33262m -1995728.21s" $ (fromRational $ negate $ 23 * 86400 + 8528.21 :: NominalDiffTime)
+    ]
+
+testDiffTime :: TestTree
+testDiffTime = testGroup "DiffTime"
+    [
+        testAFormat "%ww%Dd%Hh%Mm%ESs" "3w2d2h22m8.21s" $ (fromRational $ 23 * 86400 + 8528.21 :: DiffTime),
+        testAFormat "%dd %hh %mm %ss %Ess" "0d 0h 0m 0s 0.74s" $ (fromRational $ 0.74 :: DiffTime),
+        testAFormat "%dd %hh %mm %ss %Ess" "0d 0h 0m 0s -0.74s" $ (fromRational $ negate $ 0.74 :: DiffTime),
+        testAFormat "%dd %hh %mm %ss %Ess %0Ess" "23d 554h 33262m 1995728s 1995728.21s 1995728.210000000000s" $ (fromRational $ 23 * 86400 + 8528.21 :: DiffTime),
+        testAFormat "%ww%Dd%Hh%Mm%Ss" "-3w-2d-2h-22m-8s" $ (fromRational $ negate $ 23 * 86400 + 8528.21 :: DiffTime),
+        testAFormat "%ww%Dd%Hh%Mm%ESs" "-3w-2d-2h-22m-8.21s" $ (fromRational $ negate $ 23 * 86400 + 8528.21 :: DiffTime),
+        testAFormat "%ww%Dd%Hh%Mm%Ss" "-3w-2d-2h-22m0s" $ (fromRational $ negate $ 23 * 86400 + 8520.21 :: DiffTime),
+        testAFormat "%ww%Dd%Hh%Mm%ESs" "-3w-2d-2h-22m-0.21s" $ (fromRational $ negate $ 23 * 86400 + 8520.21 :: DiffTime),
+        testAFormat "%dd %hh %mm %Ess" "-23d -554h -33262m -1995728.21s" $ (fromRational $ negate $ 23 * 86400 + 8528.21 :: DiffTime)
+    ]
+
+testCalenderDiffDays :: TestTree
+testCalenderDiffDays = testGroup "CalenderDiffDays"
+    [
+        testAFormat "%yy%Bm%ww%Dd" "5y4m3w2d" $ CalendarDiffDays 64 23,
+        testAFormat "%bm %dd" "64m 23d" $ CalendarDiffDays 64 23,
+        testAFormat "%yy%Bm%ww%Dd" "-5y-4m-3w-2d" $ CalendarDiffDays (-64) (-23),
+        testAFormat "%bm %dd" "-64m -23d" $ CalendarDiffDays (-64) (-23)
+    ]
+
+testCalenderDiffTime :: TestTree
+testCalenderDiffTime = testGroup "CalenderDiffTime"
+    [
+        testAFormat "%yy%Bm%ww%Dd%Hh%Mm%Ss" "5y4m3w2d2h22m8s" $ CalendarDiffTime 64 $ 23 * 86400 + 8528.21,
+        testAFormat "%yy%Bm%ww%Dd%Hh%Mm%ESs" "5y4m3w2d2h22m8.21s" $ CalendarDiffTime 64 $ 23 * 86400 + 8528.21,
+        testAFormat "%yy%Bm%ww%Dd%Hh%Mm%0ESs" "5y4m3w2d2h22m08.210000000000s" $ CalendarDiffTime 64 $ 23 * 86400 + 8528.21,
+        testAFormat "%bm %dd %hh %mm %Ess" "64m 23d 554h 33262m 1995728.21s" $ CalendarDiffTime 64 $ 23 * 86400 + 8528.21,
+        testAFormat "%yy%Bm%ww%Dd%Hh%Mm%Ss" "-5y-4m-3w-2d-2h-22m-8s" $ CalendarDiffTime (-64) $ negate $ 23 * 86400 + 8528.21,
+        testAFormat "%yy%Bm%ww%Dd%Hh%Mm%ESs" "-5y-4m-3w-2d-2h-22m-8.21s" $ CalendarDiffTime (-64) $ negate $ 23 * 86400 + 8528.21,
+        testAFormat "%bm %dd %hh %mm %Ess" "-64m -23d -554h -33262m -1995728.21s" $ CalendarDiffTime (-64) $ negate $ 23 * 86400 + 8528.21
+    ]
+-}
+
+testFormat :: TestTree
+testFormat = testGroup "testFormat" $ [
+    testCheckParse,
+    testDayOfWeek
+--    testTimeZone,
+--    testNominalDiffTime,
+--    testDiffTime,
+--    testCalenderDiffDays,
+--    testCalenderDiffTime
+    ]
diff --git a/test/main/Test/Format/ISO8601.hs b/test/main/Test/Format/ISO8601.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Format/ISO8601.hs
@@ -0,0 +1,291 @@
+{-# OPTIONS -fno-warn-orphans #-}
+module Test.Format.ISO8601(testISO8601) where
+
+import Data.Time.Compat
+import Data.Time.Format.ISO8601.Compat
+
+import Data.Ratio
+import Test.QuickCheck.Property
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Tasty.QuickCheck hiding (reason)
+import Test.TestUtil
+import Test.Arbitrary()
+
+
+deriving instance Eq ZonedTime
+
+readShowProperty :: (Eq a,Show a) => Format a -> a -> Property
+readShowProperty fmt val = case formatShowM fmt val of
+    Nothing -> property Discard
+    Just str -> let
+        found = formatParseM fmt str
+        expected = Just val
+        in property $ if expected == found then succeeded else
+            failed {reason = show str ++ ": expected " ++ (show expected) ++ ", found " ++ (show found)}
+
+readBoth :: NameTest t => (FormatExtension -> t) -> [TestTree]
+readBoth fmts =
+    [
+        nameTest "extended" $ fmts ExtendedFormat,
+        nameTest "basic" $ fmts BasicFormat
+    ]
+
+readShowProperties :: (Eq a,Show a,Arbitrary a) => (FormatExtension -> Format a) -> [TestTree]
+readShowProperties fmts = readBoth $ \fe -> readShowProperty $ fmts fe
+
+newtype Durational t = MkDurational t
+
+instance Show t => Show (Durational t) where
+    show (MkDurational t) = show t
+
+instance Arbitrary (Durational CalendarDiffDays) where
+    arbitrary = do
+        mm <- choose (-10000,10000)
+        dd <- choose (-40,40)
+        return $ MkDurational $ CalendarDiffDays mm dd
+
+instance Arbitrary (Durational CalendarDiffTime) where
+    arbitrary = let
+        limit = 40 * 86400
+        picofactor = 10 ^ (12 :: Int)
+        in do
+            mm <- choose (-10000,10000)
+            ss <- choose (negate limit * picofactor, limit * picofactor)
+            return $ MkDurational $ CalendarDiffTime mm $ fromRational $ ss % picofactor
+
+testReadShowFormat :: TestTree
+testReadShowFormat = nameTest "read-show format"
+    [
+        nameTest "calendarFormat" $ readShowProperties $ calendarFormat,
+        nameTest "yearMonthFormat" $ readShowProperty $ yearMonthFormat,
+        nameTest "yearFormat" $ readShowProperty $ yearFormat,
+        nameTest "centuryFormat" $ readShowProperty $ centuryFormat,
+        nameTest "expandedCalendarFormat" $ readShowProperties $ expandedCalendarFormat 6,
+        nameTest "expandedYearMonthFormat" $ readShowProperty $ expandedYearMonthFormat 6,
+        nameTest "expandedYearFormat" $ readShowProperty $ expandedYearFormat 6,
+        nameTest "expandedCenturyFormat" $ readShowProperty $ expandedCenturyFormat 4,
+        nameTest "ordinalDateFormat" $ readShowProperties $ ordinalDateFormat,
+        nameTest "expandedOrdinalDateFormat" $ readShowProperties $ expandedOrdinalDateFormat 6,
+        nameTest "weekDateFormat" $ readShowProperties $ weekDateFormat,
+        nameTest "yearWeekFormat" $ readShowProperties $ yearWeekFormat,
+        nameTest "expandedWeekDateFormat" $ readShowProperties $ expandedWeekDateFormat 6,
+        nameTest "expandedYearWeekFormat" $ readShowProperties $ expandedYearWeekFormat 6,
+        nameTest "timeOfDayFormat" $ readShowProperties $ timeOfDayFormat,
+        nameTest "hourMinuteFormat" $ readShowProperties $ hourMinuteFormat,
+        nameTest "hourFormat" $ readShowProperty $ hourFormat,
+        nameTest "withTimeDesignator" $ readShowProperties $ \fe -> withTimeDesignator $ timeOfDayFormat fe,
+        nameTest "withUTCDesignator" $ readShowProperties $ \fe -> withUTCDesignator $ timeOfDayFormat fe,
+        nameTest "timeOffsetFormat" $ readShowProperties $ timeOffsetFormat,
+        nameTest "timeOfDayAndOffsetFormat" $ readShowProperties $ timeOfDayAndOffsetFormat,
+        nameTest "localTimeFormat" $ readShowProperties $ \fe -> localTimeFormat (calendarFormat fe) (timeOfDayFormat fe),
+        nameTest "zonedTimeFormat" $ readShowProperties $ \fe -> zonedTimeFormat (calendarFormat fe) (timeOfDayFormat fe) fe,
+        nameTest "utcTimeFormat" $ readShowProperties $ \fe -> utcTimeFormat (calendarFormat fe) (timeOfDayFormat fe),
+        nameTest "dayAndTimeFormat" $ readShowProperties $ \fe -> dayAndTimeFormat (calendarFormat fe) (timeOfDayFormat fe),
+        nameTest "timeAndOffsetFormat" $ readShowProperties $ \fe -> timeAndOffsetFormat (timeOfDayFormat fe) fe,
+        nameTest "durationDaysFormat" $ readShowProperty $ durationDaysFormat,
+        nameTest "durationTimeFormat" $ readShowProperty $ durationTimeFormat,
+        nameTest "alternativeDurationDaysFormat" $ readBoth $ \fe (MkDurational t) -> readShowProperty (alternativeDurationDaysFormat fe) t,
+        nameTest "alternativeDurationTimeFormat" $ readBoth $ \fe (MkDurational t) -> readShowProperty (alternativeDurationTimeFormat fe) t,
+        nameTest "intervalFormat" $ readShowProperties $ \fe -> intervalFormat (localTimeFormat (calendarFormat fe) (timeOfDayFormat fe)) durationTimeFormat,
+        nameTest "recurringIntervalFormat" $ readShowProperties $ \fe -> recurringIntervalFormat (localTimeFormat (calendarFormat fe) (timeOfDayFormat fe)) durationTimeFormat
+    ]
+
+testShowFormat :: String -> Format t -> String -> t -> TestTree
+testShowFormat name fmt str t = nameTest (name ++ ": " ++ str) $
+    assertEqual "" (Just str) $ formatShowM fmt t
+
+testShowFormats :: TestTree
+testShowFormats = nameTest "show format"
+    [
+        testShowFormat "durationDaysFormat" durationDaysFormat "P0D" $ CalendarDiffDays 0 0,
+        testShowFormat "durationDaysFormat" durationDaysFormat "P4Y" $ CalendarDiffDays 48 0,
+        testShowFormat "durationDaysFormat" durationDaysFormat "P7M" $ CalendarDiffDays 7 0,
+        testShowFormat "durationDaysFormat" durationDaysFormat "P5D" $ CalendarDiffDays 0 5,
+        testShowFormat "durationDaysFormat" durationDaysFormat "P2Y3M81D" $ CalendarDiffDays 27 81,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P0D" $ CalendarDiffTime 0 0,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P4Y" $ CalendarDiffTime 48 0,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P7M" $ CalendarDiffTime 7 0,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P5D" $ CalendarDiffTime 0 $ 5 * nominalDay,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P2Y3M81D" $ CalendarDiffTime 27 $ 81 * nominalDay,
+        testShowFormat "durationTimeFormat" durationTimeFormat "PT2H" $ CalendarDiffTime 0 $ 7200,
+        testShowFormat "durationTimeFormat" durationTimeFormat "PT3M" $ CalendarDiffTime 0 $ 180,
+        testShowFormat "durationTimeFormat" durationTimeFormat "PT12S" $ CalendarDiffTime 0 $ 12,
+        testShowFormat "durationTimeFormat" durationTimeFormat "PT1M18.77634S" $ CalendarDiffTime 0 $ 78.77634,
+        testShowFormat "durationTimeFormat" durationTimeFormat "PT2H1M18.77634S" $ CalendarDiffTime 0 $ 7278.77634,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P5DT2H1M18.77634S" $ CalendarDiffTime 0 $ 5 * nominalDay + 7278.77634,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P7Y10M5DT2H1M18.77634S" $ CalendarDiffTime 94 $ 5 * nominalDay + 7278.77634,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P7Y10MT2H1M18.77634S" $ CalendarDiffTime 94 $ 7278.77634,
+        testShowFormat "durationTimeFormat" durationTimeFormat "P8YT2H1M18.77634S" $ CalendarDiffTime 96 $ 7278.77634,
+        testShowFormat "alternativeDurationDaysFormat" (alternativeDurationDaysFormat ExtendedFormat) "P0001-00-00" $ CalendarDiffDays 12 0,
+        testShowFormat "alternativeDurationDaysFormat" (alternativeDurationDaysFormat ExtendedFormat) "P0002-03-29" $ CalendarDiffDays 27 29,
+        testShowFormat "alternativeDurationDaysFormat" (alternativeDurationDaysFormat ExtendedFormat) "P0561-08-29" $ CalendarDiffDays (561 * 12 + 8) 29,
+        testShowFormat "alternativeDurationTimeFormat" (alternativeDurationTimeFormat ExtendedFormat) "P0000-00-01T00:00:00" $ CalendarDiffTime 0 86400,
+        testShowFormat "alternativeDurationTimeFormat" (alternativeDurationTimeFormat ExtendedFormat) "P0007-10-05T02:01:18.77634" $ CalendarDiffTime 94 $ 5 * nominalDay + 7278.77634,
+        testShowFormat "alternativeDurationTimeFormat" (alternativeDurationTimeFormat ExtendedFormat) "P4271-10-05T02:01:18.77634" $ CalendarDiffTime (12 * 4271 + 10) $ 5 * nominalDay + 7278.77634,
+        testShowFormat "centuryFormat" centuryFormat "02" 2,
+        testShowFormat "centuryFormat" centuryFormat "21" 21,
+        testShowFormat "intervalFormat etc."
+            (intervalFormat (localTimeFormat (calendarFormat ExtendedFormat) (timeOfDayFormat ExtendedFormat)) durationTimeFormat)
+            "2015-06-13T21:13:56/P1Y2M7DT5H33M2.34S"
+            (LocalTime (fromGregorian 2015 6 13) (TimeOfDay 21 13 56),CalendarDiffTime 14 $ 7 * nominalDay + 5 * 3600 + 33 * 60 + 2.34),
+        testShowFormat "recurringIntervalFormat etc."
+            (recurringIntervalFormat (localTimeFormat (calendarFormat ExtendedFormat) (timeOfDayFormat ExtendedFormat)) durationTimeFormat)
+            "R74/2015-06-13T21:13:56/P1Y2M7DT5H33M2.34S"
+            (74,LocalTime (fromGregorian 2015 6 13) (TimeOfDay 21 13 56),CalendarDiffTime 14 $ 7 * nominalDay + 5 * 3600 + 33 * 60 + 2.34),
+        testShowFormat "recurringIntervalFormat etc."
+            (recurringIntervalFormat (calendarFormat ExtendedFormat) durationDaysFormat)
+            "R74/2015-06-13/P1Y2M7D"
+            (74,fromGregorian 2015 6 13,CalendarDiffDays 14 7),
+        testShowFormat "timeOffsetFormat"
+            iso8601Format
+            "-06:30"
+            (minutesToTimeZone (-390)),
+        testShowFormat "timeOffsetFormat"
+            iso8601Format
+            "+00:00"
+            (minutesToTimeZone 0),
+        testShowFormat "timeOffsetFormat"
+            (timeOffsetFormat BasicFormat)
+            "+0000"
+            (minutesToTimeZone 0),
+        testShowFormat "timeOffsetFormat"
+            iso8601Format
+            "+00:10"
+            (minutesToTimeZone 10),
+        testShowFormat "timeOffsetFormat"
+            iso8601Format
+            "-00:10"
+            (minutesToTimeZone (-10)),
+        testShowFormat "timeOffsetFormat"
+            iso8601Format
+            "+01:35"
+            (minutesToTimeZone 95),
+        testShowFormat "timeOffsetFormat"
+            iso8601Format
+            "-01:35"
+            (minutesToTimeZone (-95)),
+        testShowFormat "timeOffsetFormat"
+            (timeOffsetFormat BasicFormat)
+            "+0135"
+            (minutesToTimeZone 95),
+        testShowFormat "timeOffsetFormat"
+            (timeOffsetFormat BasicFormat)
+            "-0135"
+            (minutesToTimeZone (-95)),
+        testShowFormat "timeOffsetFormat"
+            (timeOffsetFormat BasicFormat)
+            "-1100"
+            (minutesToTimeZone $ negate $ 11 * 60),
+        testShowFormat "timeOffsetFormat"
+            (timeOffsetFormat BasicFormat)
+            "+1015"
+            (minutesToTimeZone $ 615),
+        testShowFormat "zonedTimeFormat"
+            iso8601Format
+            "2024-07-06T08:45:56.553-06:30"
+            (ZonedTime (LocalTime (fromGregorian 2024 07 06) (TimeOfDay 8 45 56.553)) (minutesToTimeZone (-390))),
+        testShowFormat "zonedTimeFormat"
+            iso8601Format
+            "2024-07-06T08:45:56.553+06:30"
+            (ZonedTime (LocalTime (fromGregorian 2024 07 06) (TimeOfDay 8 45 56.553)) (minutesToTimeZone 390)),
+        testShowFormat "utcTimeFormat"
+            iso8601Format
+            "2024-07-06T08:45:56.553Z"
+            (UTCTime (fromGregorian 2024 07 06) (timeOfDayToTime $ TimeOfDay 8 45 56.553)),
+        testShowFormat "utcTimeFormat"
+            iso8601Format
+            "2028-12-31T23:59:60.9Z"
+            (UTCTime (fromGregorian 2028 12 31) (timeOfDayToTime $ TimeOfDay 23 59 60.9)),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat ExtendedFormat)
+            "1994-W52-7"
+            (fromGregorian 1995 1 1),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat ExtendedFormat)
+            "1995-W01-1"
+            (fromGregorian 1995 1 2),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat ExtendedFormat)
+            "1996-W52-7"
+            (fromGregorian 1996 12 29),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat ExtendedFormat)
+            "1997-W01-2"
+            (fromGregorian 1996 12 31),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat ExtendedFormat)
+            "1997-W01-3"
+            (fromGregorian 1997 1 1),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat ExtendedFormat)
+            "1974-W32-6"
+            (fromGregorian 1974 8 10),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat BasicFormat)
+            "1974W326"
+            (fromGregorian 1974 8 10),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat ExtendedFormat)
+            "1995-W05-6"
+            (fromGregorian 1995 2 4),
+        testShowFormat "weekDateFormat"
+            (weekDateFormat BasicFormat)
+            "1995W056"
+            (fromGregorian 1995 2 4),
+        testShowFormat "weekDateFormat"
+            (expandedWeekDateFormat 6 ExtendedFormat)
+            "+001995-W05-6"
+            (fromGregorian 1995 2 4),
+        testShowFormat "weekDateFormat"
+            (expandedWeekDateFormat 6 BasicFormat)
+            "+001995W056"
+            (fromGregorian 1995 2 4),
+        testShowFormat "ordinalDateFormat"
+            (ordinalDateFormat ExtendedFormat)
+            "1846-235"
+            (fromGregorian 1846 8 23),
+        testShowFormat "ordinalDateFormat"
+            (ordinalDateFormat BasicFormat)
+            "1844236"
+            (fromGregorian 1844 8 23),
+        testShowFormat "ordinalDateFormat"
+            (expandedOrdinalDateFormat 5 ExtendedFormat)
+            "+01846-235"
+            (fromGregorian 1846 8 23),
+        testShowFormat "hourMinuteFormat"
+            (hourMinuteFormat ExtendedFormat)
+            "13:17.25"
+            (TimeOfDay 13 17 15),
+        testShowFormat "hourMinuteFormat"
+            (hourMinuteFormat ExtendedFormat)
+            "01:12.4"
+            (TimeOfDay 1 12 24),
+        testShowFormat "hourMinuteFormat"
+            (hourMinuteFormat BasicFormat)
+            "1317.25"
+            (TimeOfDay 13 17 15),
+        testShowFormat "hourMinuteFormat"
+            (hourMinuteFormat BasicFormat)
+            "0112.4"
+            (TimeOfDay 1 12 24),
+        testShowFormat "hourFormat"
+            hourFormat
+            "22"
+            (TimeOfDay 22 0 0),
+        testShowFormat "hourFormat"
+            hourFormat
+            "06"
+            (TimeOfDay 6 0 0),
+        testShowFormat "hourFormat"
+            hourFormat
+            "18.9475"
+            (TimeOfDay 18 56 51)
+    ]
+
+testISO8601 :: TestTree
+testISO8601 = nameTest "ISO8601"
+    [
+        testShowFormats,
+        testReadShowFormat
+    ]
diff --git a/test/main/Test/Format/ParseTime.hs b/test/main/Test/Format/ParseTime.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/Format/ParseTime.hs
@@ -0,0 +1,529 @@
+{-# OPTIONS -fno-warn-orphans #-}
+module Test.Format.ParseTime(testParseTime,test_parse_format) where
+
+import Data.Time.Compat
+import Data.Time.Calendar.OrdinalDate.Compat
+import Data.Time.Calendar.WeekDate.Compat
+
+import Control.Monad
+import Data.Char
+import Text.Read.Compat
+import Test.QuickCheck.Property
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Tasty.QuickCheck hiding (reason)
+import Test.TestUtil
+import Test.Arbitrary()
+
+
+testParseTime :: TestTree
+testParseTime = testGroup "testParseTime"
+    [
+    readOtherTypesTest,
+    readTests,
+    simpleFormatTests,
+    extests,
+    particularParseTests,
+    badParseTests,
+    defaultTimeZoneTests,
+    militaryTimeZoneTests,
+    propertyTests
+    ]
+
+yearDays :: Integer -> [Day]
+yearDays y = [(fromGregorian y 1 1) .. (fromGregorian y 12 31)]
+
+makeExhaustiveTest :: String -> [t] -> (t -> TestTree) -> TestTree
+makeExhaustiveTest name cases f = testGroup name (fmap f cases)
+
+extests :: TestTree
+extests = testGroup "exhaustive" ([
+    makeExhaustiveTest "parse %y" [0..99] parseYY,
+    makeExhaustiveTest "parse %-C %y 1900s" [0,1,50,99] (parseCYY 19),
+    makeExhaustiveTest "parse %-C %y 2000s" [0,1,50,99] (parseCYY 20),
+    makeExhaustiveTest "parse %-C %y 1400s" [0,1,50,99] (parseCYY 14),
+    makeExhaustiveTest "parse %C %y 0700s" [0,1,50,99] (parseCYY2 7),
+    makeExhaustiveTest "parse %-C %y 700s" [0,1,50,99] (parseCYY 7),
+    makeExhaustiveTest "parse %-C %y 10000s" [0,1,50,99] (parseCYY 100),
+    makeExhaustiveTest "parse %-C centuries" [20..100] (parseCentury " "),
+    makeExhaustiveTest "parse %-C century X" [1,10,20,100] (parseCentury "X"),
+    makeExhaustiveTest "parse %-C century 2sp" [1,10,20,100] (parseCentury "  "),
+    makeExhaustiveTest "parse %-C century 5sp" [1,10,20,100] (parseCentury "     ")
+    ] ++
+    (concat $ fmap
+    (\y -> [
+    (makeExhaustiveTest "parse %Y%m%d" (yearDays y) parseYMD),
+    (makeExhaustiveTest "parse %Y %m %d" (yearDays y) parseYearDayD),
+    (makeExhaustiveTest "parse %Y %-m %e" (yearDays y) parseYearDayE)
+    ]) [1,4,20,753,2000,2011,10001]))
+
+readTest :: (Eq a,Show a,Read a) => [(a,String)] -> String -> TestTree
+readTest expected target = let
+    found = reads target
+    result = assertEqual "" expected found
+    name = show target
+    in Test.Tasty.HUnit.testCase name result
+
+readTestsParensSpaces :: forall a. (Eq a,Show a,Read a) => a -> String -> TestTree
+readTestsParensSpaces expected target = testGroup target
+    [
+    readTest [(expected,"")] $ target,
+    readTest [(expected,"")] $ "("++target++")",
+    readTest [(expected,"")] $ " ("++target++")",
+    readTest [(expected," ")] $ " ( "++target++" ) ",
+    readTest [(expected," ")] $ " (( "++target++" )) ",
+    readTest ([] :: [(a,String)]) $ "("++target,
+    readTest [(expected,")")] $ ""++target++")",
+    readTest [(expected,"")] $ "(("++target++"))",
+    readTest [(expected," ")] $ "  (   (     "++target++"   )  ) "
+    ] where
+
+readOtherTypesTest :: TestTree
+readOtherTypesTest = testGroup "read other types"
+    [
+    readTestsParensSpaces (3 :: Integer) "3",
+    readTestsParensSpaces "a" "\"a\""
+    ]
+
+readTests :: TestTree
+readTests = testGroup "read times"
+    [
+    readTestsParensSpaces testDay "1912-07-08",
+    --readTestsParensSpaces testDay "1912-7-8",
+    readTestsParensSpaces testTimeOfDay "08:04:02"
+    --,readTestsParensSpaces testTimeOfDay "8:4:2"
+    ] where
+    testDay = fromGregorian 1912 7 8
+    testTimeOfDay = TimeOfDay 8 4 2
+
+epoch :: LocalTime
+epoch = LocalTime (fromGregorian 1970 0 0) midnight
+
+simpleFormatTests :: TestTree
+simpleFormatTests = testGroup "simple"
+    [
+    readsTest [(epoch,"")] "" "",
+    readsTest [(epoch," ")] "" " ",
+    readsTest [(epoch,"")] " " " ",
+    readsTest [(epoch,"")] " " "  ",
+    readsTest [(epoch,"")] "%k" "0",
+    readsTest [(epoch,"")] "%k" " 0",
+    readsTest [(epoch,"")] "%m" "01",
+    readsTest [(epoch," ")] "%m" "01 ",
+    readsTest [(epoch," ")] " %m" " 01 ",
+    readsTest [(epoch,"")] " %m" " 01",
+    -- https://ghc.haskell.org/trac/ghc/ticket/9150
+    readsTest [(epoch,"")] " %M" " 00",
+    readsTest [(epoch,"")] "%M " "00 ",
+    readsTest [(epoch,"")] "%Q" "",
+    readsTest [(epoch," ")] "%Q" " ",
+    readsTest [(epoch,"X")] "%Q" "X",
+    readsTest [(epoch," X")] "%Q" " X",
+    readsTest [(epoch,"")] "%Q " " ",
+    readsTest [(epoch,"")] "%Q X" " X",
+    readsTest [(epoch,"")] "%QX" "X"
+    ] where
+    readsTest :: (Show a, Eq a, ParseTime a) => [(a,String)] -> String -> String -> TestTree
+    readsTest expected formatStr target = let
+        found = readSTime False defaultTimeLocale formatStr target
+        result = assertEqual "" expected found
+        name = (show formatStr) ++ " of " ++ (show target)
+        in Test.Tasty.HUnit.testCase name result
+
+spacingTests :: (Show t, Eq t, ParseTime t) => t -> String -> String -> TestTree
+spacingTests expected formatStr target = testGroup "particular"
+    [
+        parseTest False (Just expected) formatStr target,
+        parseTest True (Just expected) formatStr target,
+        parseTest False (Just expected) (formatStr ++ " ") (target ++ " "),
+        parseTest True (Just expected) (formatStr ++ " ") (target ++ " "),
+        parseTest False (Just expected) (" " ++ formatStr) (" " ++ target),
+        parseTest True (Just expected) (" " ++ formatStr) (" " ++ target),
+        parseTest True (Just expected) ("" ++ formatStr) (" " ++ target),
+        parseTest True (Just expected) (" " ++ formatStr) ("  " ++ target)
+    ]
+
+particularParseTests :: TestTree
+particularParseTests = testGroup "particular"
+    [
+        spacingTests epoch "%Q" "",
+        spacingTests epoch "%Q" ".0",
+        spacingTests epoch "%k" " 0",
+        spacingTests epoch "%M" "00",
+        spacingTests epoch "%m" "01",
+        spacingTests (TimeZone 120 False "") "%z" "+0200",
+        spacingTests (TimeZone 120 False "") "%Z" "+0200",
+        spacingTests (TimeZone (-480) False "PST") "%Z" "PST"
+    ]
+
+badParseTests :: TestTree
+badParseTests = testGroup "bad"
+    [
+        parseTest False (Nothing :: Maybe Day) "%Y" ""
+    ]
+
+parseYMD :: Day -> TestTree
+parseYMD day = case toGregorian day of
+    (y,m,d) -> parseTest False (Just day) "%Y%m%d" ((show y) ++ (show2 m) ++ (show2 d))
+
+parseYearDayD :: Day -> TestTree
+parseYearDayD day = case toGregorian day of
+    (y,m,d) -> parseTest False (Just day) "%Y %m %d" ((show y) ++ " " ++ (show2 m) ++ " " ++ (show2 d))
+
+parseYearDayE :: Day -> TestTree
+parseYearDayE day = case toGregorian day of
+    (y,m,d) -> parseTest False (Just day) "%Y %-m %e" ((show y) ++ " " ++ (show m) ++ " " ++ (show d))
+
+-- | 1969 - 2068
+expectedYear :: Integer -> Integer
+expectedYear i | i >= 69 = 1900 + i
+expectedYear i = 2000 + i
+
+show2 :: (Show n,Integral n) => n -> String
+show2 i = (show (div i 10)) ++ (show (mod i 10))
+
+parseYY :: Integer -> TestTree
+parseYY i = parseTest False (Just (fromGregorian (expectedYear i) 1 1)) "%y" (show2 i)
+
+parseCYY :: Integer -> Integer -> TestTree
+parseCYY c i = parseTest False (Just (fromGregorian ((c * 100) + i) 1 1)) "%-C %y" ((show c) ++ " " ++ (show2 i))
+
+parseCYY2 :: Integer -> Integer -> TestTree
+parseCYY2 c i = parseTest False (Just (fromGregorian ((c * 100) + i) 1 1)) "%C %y" ((show2 c) ++ " " ++ (show2 i))
+
+parseCentury :: String -> Integer -> TestTree
+parseCentury int c = parseTest False (Just (fromGregorian (c * 100) 1 1)) ("%-C" ++ int ++ "%y") ((show c) ++ int ++ "00")
+
+parseTest :: (Show t, Eq t, ParseTime t) => Bool -> Maybe t -> String -> String -> TestTree
+parseTest sp expected formatStr target = let
+    found = parse sp formatStr target
+    result = assertEqual "" expected found
+    name = (show formatStr) ++ " of " ++ (show target) ++ (if sp then " allowing spaces" else "")
+    in Test.Tasty.HUnit.testCase name result
+{-
+readsTest :: forall t. (Show t, Eq t, ParseTime t) => Maybe t -> String -> String -> TestTree
+readsTest (Just e) = readsTest' [(e,"")]
+readsTest Nothing = readsTest' ([] :: [(t,String)])
+-}
+
+enumAdd :: (Enum a) => Int -> a -> a
+enumAdd i a = toEnum (i + fromEnum a)
+
+getMilZoneLetter :: Int -> Char
+getMilZoneLetter 0 = 'Z'
+getMilZoneLetter h | h < 0 = enumAdd (negate h) 'M'
+getMilZoneLetter h | h < 10 = enumAdd (h - 1) 'A'
+getMilZoneLetter h = enumAdd (h - 10) 'K'
+
+getMilZone :: Int -> TimeZone
+getMilZone hour = TimeZone (hour * 60) False [getMilZoneLetter hour]
+
+testParseTimeZone :: TimeZone -> TestTree
+testParseTimeZone tz = parseTest False (Just tz) "%Z" (timeZoneName tz)
+
+#if !MIN_VERSION_time(1,5,0)
+knownTimeZones _ = []
+#endif
+
+defaultTimeZoneTests :: TestTree
+defaultTimeZoneTests = testGroup "default time zones" (fmap testParseTimeZone (knownTimeZones defaultTimeLocale))
+
+militaryTimeZoneTests :: TestTree
+militaryTimeZoneTests = testGroup "military time zones" (fmap (testParseTimeZone . getMilZone) [-12 .. 12])
+
+
+parse :: ParseTime t => Bool -> String -> String -> Maybe t
+parse sp f t = parseTimeM sp defaultTimeLocale f t
+
+format :: (FormatTime t) => String -> t -> String
+format f t = formatTime defaultTimeLocale f t
+
+-- missing from the time package
+instance Eq ZonedTime where
+    ZonedTime t1 tz1 == ZonedTime t2 tz2 = t1 == t2 && tz1 == tz2
+
+compareResult' :: (Eq a,Show a) => String -> a -> a -> Result
+compareResult' extra expected found
+    | expected == found = succeeded
+    | otherwise = failed {reason = "expected " ++ (show expected) ++ ", found " ++ (show found) ++ extra}
+
+compareResult :: (Eq a,Show a) => a -> a -> Result
+compareResult = compareResult' ""
+
+compareParse :: forall a. (Eq a,Show a,ParseTime a) => a -> String -> String -> Result
+compareParse expected fmt text = compareResult' (", parsing " ++ (show text)) (Just expected) (parse False fmt text)
+
+--
+-- * tests for debugging failing cases
+--
+
+test_parse_format :: (FormatTime t,ParseTime t,Show t) => String -> t -> (String,String,Maybe t)
+test_parse_format f t = let s = format f t in (show t, s, parse False f s `asTypeOf` Just t)
+
+--
+-- * show and read
+--
+
+prop_read_show :: (Read a, Show a, Eq a) => a -> Result
+prop_read_show t = compareResult (Just t) (readMaybe (show t))
+
+--
+-- * special show functions
+--
+
+prop_parse_showWeekDate :: Day -> Result
+prop_parse_showWeekDate d = compareParse d "%G-W%V-%u" (showWeekDate d)
+
+prop_parse_showGregorian :: Day -> Result
+prop_parse_showGregorian d = compareParse d "%Y-%m-%d" (showGregorian d)
+
+prop_parse_showOrdinalDate :: Day -> Result
+prop_parse_showOrdinalDate d = compareParse d "%Y-%j" (showOrdinalDate d)
+
+--
+-- * fromMondayStartWeek and fromSundayStartWeek
+--
+
+prop_fromMondayStartWeek :: Day -> Result
+prop_fromMondayStartWeek d =
+    let (w,wd)  = mondayStartWeek d
+        (y,_,_) = toGregorian d
+     in compareResult d (fromMondayStartWeek y w wd)
+
+prop_fromSundayStartWeek :: Day -> Result
+prop_fromSundayStartWeek d =
+    let (w,wd)  = sundayStartWeek d
+        (y,_,_) = toGregorian d
+     in compareResult d (fromSundayStartWeek y w wd)
+
+--
+-- * format and parse
+--
+
+prop_parse_format :: (Eq t, FormatTime t, ParseTime t, Show t) => FormatString t -> t -> Result
+prop_parse_format (FormatString f) t = compareParse t f (format f t)
+
+-- Verify case-insensitivity with upper case.
+prop_parse_format_upper :: (Eq t, FormatTime t, ParseTime t, Show t) => FormatString t -> t -> Result
+prop_parse_format_upper (FormatString f) t = compareParse t f (map toUpper $ format f t)
+
+-- Verify case-insensitivity with lower case.
+prop_parse_format_lower :: (Eq t, FormatTime t, ParseTime t, Show t) => FormatString t -> t -> Result
+prop_parse_format_lower (FormatString f) t = compareParse t f (map toLower $ format f t)
+
+prop_format_parse_format :: (FormatTime t, ParseTime t) => FormatString t -> t -> Result
+prop_format_parse_format (FormatString f) t = compareResult
+    (Just (format f t))
+    (fmap (format f) (parse False f (format f t) `asTypeOf` Just t))
+
+--
+-- * crashes in parse
+--
+
+newtype Input = Input String
+
+instance Show Input where
+    show (Input s) = s
+
+instance Arbitrary Input where
+    arbitrary = liftM Input $ list cs
+      where cs = elements (['0'..'9'] ++ ['-',' ','/'] ++ ['a'..'z'] ++ ['A' .. 'Z'])
+            list g = sized (\n -> choose (0,n) >>= \l -> replicateM l g)
+instance CoArbitrary Input where
+    coarbitrary (Input s) = coarbitrary (sum (map ord s))
+
+prop_no_crash_bad_input :: (Eq t, ParseTime t) => FormatString t -> Input -> Property
+prop_no_crash_bad_input fs@(FormatString f) (Input s) = property $
+    case parse False f s of
+      Nothing -> True
+      Just t  -> t == t `asTypeOf` formatType fs
+
+--
+--
+--
+
+newtype FormatString a = FormatString String
+
+formatType :: FormatString t -> t
+formatType _ = undefined
+
+instance Show (FormatString a) where
+    show (FormatString f) = show f
+
+typedTests :: (forall t. (Eq t, FormatTime t, ParseTime t, Show t) => FormatString t -> t -> Result) -> [TestTree]
+typedTests prop = [
+    nameTest "Day" $ tgroup dayFormats prop,
+    nameTest "TimeOfDay" $ tgroup timeOfDayFormats prop,
+    nameTest "LocalTime" $ tgroup localTimeFormats prop,
+    nameTest "TimeZone" $ tgroup timeZoneFormats prop,
+    nameTest "ZonedTime" $ tgroup zonedTimeFormats prop,
+    nameTest "ZonedTime" $ tgroup zonedTimeAlmostFormats $ \fmt t -> (todSec $ localTimeOfDay $ zonedTimeToLocalTime t) < 60 ==> prop fmt t,
+    nameTest "UTCTime" $ tgroup utcTimeAlmostFormats $ \fmt t -> utctDayTime t < 86400 ==> prop fmt t,
+    nameTest "UniversalTime" $ tgroup universalTimeFormats prop
+    -- nameTest "CalendarDiffDays" $ tgroup calendarDiffDaysFormats prop,
+    -- nameTest "CalenderDiffTime" $ tgroup calendarDiffTimeFormats prop,
+    -- nameTest "DiffTime" $ tgroup diffTimeFormats prop,
+    -- nameTest "NominalDiffTime" $ tgroup nominalDiffTimeFormats prop
+    ]
+
+formatParseFormatTests :: TestTree
+formatParseFormatTests = nameTest "format_parse_format" [
+    nameTest "Day" $ tgroup partialDayFormats prop_format_parse_format,
+    nameTest "TimeOfDay" $ tgroup partialTimeOfDayFormats prop_format_parse_format,
+    nameTest "LocalTime" $ tgroup partialLocalTimeFormats prop_format_parse_format,
+    nameTest "ZonedTime" $ tgroup partialZonedTimeFormats prop_format_parse_format,
+    nameTest "UTCTime" $ tgroup partialUTCTimeFormats prop_format_parse_format,
+    nameTest "UniversalTime" $ tgroup partialUniversalTimeFormats prop_format_parse_format
+    ]
+
+badInputTests :: TestTree
+badInputTests = nameTest "no_crash_bad_input" [
+    nameTest "Day" $ tgroup (dayFormats ++ partialDayFormats ++ failingPartialDayFormats) prop_no_crash_bad_input,
+    nameTest "TimeOfDay" $ tgroup (timeOfDayFormats ++ partialTimeOfDayFormats) prop_no_crash_bad_input,
+    nameTest "LocalTime" $ tgroup (localTimeFormats ++ partialLocalTimeFormats) prop_no_crash_bad_input,
+    nameTest "TimeZone" $ tgroup (timeZoneFormats) prop_no_crash_bad_input,
+    nameTest "ZonedTime" $ tgroup (zonedTimeFormats ++ zonedTimeAlmostFormats ++ partialZonedTimeFormats) prop_no_crash_bad_input,
+    nameTest "UTCTime" $ tgroup (utcTimeAlmostFormats ++ partialUTCTimeFormats) prop_no_crash_bad_input,
+    nameTest "UniversalTime" $ tgroup (universalTimeFormats ++ partialUniversalTimeFormats) prop_no_crash_bad_input
+    ]
+
+readShowTests :: TestTree
+readShowTests = nameTest "read_show" [
+    nameTest "Day" (prop_read_show :: Day -> Result),
+    nameTest "TimeOfDay" (prop_read_show :: TimeOfDay -> Result),
+    nameTest "LocalTime" (prop_read_show :: LocalTime -> Result),
+    nameTest "TimeZone" (prop_read_show :: TimeZone -> Result),
+    nameTest "ZonedTime" (prop_read_show :: ZonedTime -> Result),
+    nameTest "UTCTime" (prop_read_show :: UTCTime -> Result),
+    nameTest "UniversalTime" (prop_read_show :: UniversalTime -> Result)
+    --nameTest "CalendarDiffDays" (prop_read_show :: CalendarDiffDays -> Result),
+    --nameTest "CalendarDiffTime" (prop_read_show :: CalendarDiffTime -> Result)
+    ]
+
+parseShowTests :: TestTree
+parseShowTests = nameTest "parse_show" [
+    nameTest "showWeekDate" prop_parse_showWeekDate,
+    nameTest "showGregorian" prop_parse_showGregorian,
+    nameTest "showOrdinalDate" prop_parse_showOrdinalDate
+    ]
+
+propertyTests :: TestTree
+propertyTests = nameTest "properties" [
+    readShowTests,
+    parseShowTests,
+    nameTest "fromMondayStartWeek" prop_fromMondayStartWeek,
+    nameTest "fromSundayStartWeek" prop_fromSundayStartWeek,
+    nameTest "parse_format" $ typedTests prop_parse_format,
+    nameTest "parse_format_lower" $ typedTests prop_parse_format_lower,
+    nameTest "parse_format_upper" $ typedTests prop_parse_format_upper,
+    formatParseFormatTests,
+    badInputTests
+    ]
+
+dayFormats :: [FormatString Day]
+dayFormats = map FormatString
+    [
+     -- numeric year, month, day
+     "%Y-%m-%d","%Y%m%d","%C%y%m%d","%Y %m %e","%m/%d/%Y","%d/%m/%Y","%Y/%d/%m","%D %C","%F",
+     -- month names
+     "%Y-%B-%d","%Y-%b-%d","%Y-%h-%d",
+     -- ordinal dates
+     "%Y-%j",
+     -- ISO week dates
+     "%G-%V-%u","%G-%V-%a","%G-%V-%A","%G-%V-%w", "%A week %V, %G", "day %V, week %A, %G",
+     "%G-W%V-%u",
+     "%f%g-%V-%u","%f%g-%V-%a","%f%g-%V-%A","%f%g-%V-%w", "%A week %V, %f%g", "day %V, week %A, %f%g",
+     "%f%g-W%V-%u",
+     -- monday and sunday week dates
+     "%Y-w%U-%A", "%Y-w%W-%A", "%Y-%A-w%U", "%Y-%A-w%W", "%A week %U, %Y", "%A week %W, %Y"
+    ]
+
+timeOfDayFormats :: [FormatString TimeOfDay]
+timeOfDayFormats = map FormatString
+    [
+     -- 24 h formats
+     "%H:%M:%S.%q","%k:%M:%S.%q","%H%M%S.%q","%T.%q","%X.%q","%R:%S.%q",
+     "%H:%M:%S%Q","%k:%M:%S%Q","%H%M%S%Q","%T%Q","%X%Q","%R:%S%Q",
+     -- 12 h formats
+     "%I:%M:%S.%q %p","%I:%M:%S.%q %P","%l:%M:%S.%q %p","%r %q",
+     "%I:%M:%S%Q %p","%I:%M:%S%Q %P","%l:%M:%S%Q %p","%r %Q"
+    ]
+
+localTimeFormats :: [FormatString LocalTime]
+localTimeFormats = map FormatString [{-"%Q","%Q ","%QX"-}]
+
+timeZoneFormats :: [FormatString TimeZone]
+timeZoneFormats = map FormatString ["%z","%z%Z","%Z%z","%Z"]
+
+zonedTimeFormats :: [FormatString ZonedTime]
+zonedTimeFormats = map FormatString
+  ["%a, %d %b %Y %H:%M:%S.%q %z", "%a, %d %b %Y %H:%M:%S%Q %z",
+   "%a, %d %b %Y %H:%M:%S.%q %Z", "%a, %d %b %Y %H:%M:%S%Q %Z"]
+
+zonedTimeAlmostFormats :: [FormatString ZonedTime]
+zonedTimeAlmostFormats = map FormatString  ["%s.%q %z", "%s%Q %z", "%s.%q %Z", "%s%Q %Z"]
+
+utcTimeAlmostFormats :: [FormatString UTCTime]
+utcTimeAlmostFormats = map FormatString  ["%s.%q","%s%Q"]
+
+universalTimeFormats :: [FormatString UniversalTime]
+universalTimeFormats = map FormatString []
+
+calendarDiffDaysFormats :: [FormatString CalendarDiffDays]
+calendarDiffDaysFormats = map FormatString ["%yy%Bm%ww%Dd","%yy%Bm%dd","%bm%ww%Dd","%bm%dd"]
+
+calendarDiffTimeFormats :: [FormatString CalendarDiffTime]
+calendarDiffTimeFormats = map FormatString ["%yy%Bm%ww%Dd%Hh%Mm%ESs","%bm%ww%Dd%Hh%Mm%ESs","%bm%dd%Hh%Mm%ESs","%bm%hh%Mm%ESs","%bm%mm%ESs","%bm%mm%0ESs","%bm%Ess","%bm%0Ess"]
+
+diffTimeFormats :: [FormatString DiffTime]
+diffTimeFormats = map FormatString ["%ww%Dd%Hh%Mm%ESs","%dd%Hh%Mm%ESs","%hh%Mm%ESs","%mm%ESs","%mm%0ESs","%Ess","%0Ess"]
+
+nominalDiffTimeFormats :: [FormatString NominalDiffTime]
+nominalDiffTimeFormats = map FormatString ["%ww%Dd%Hh%Mm%ESs","%dd%Hh%Mm%ESs","%hh%Mm%ESs","%mm%ESs","%mm%0ESs","%Ess","%0Ess"]
+
+--
+-- * Formats that do not include all the information
+--
+
+partialDayFormats :: [FormatString Day]
+partialDayFormats = map FormatString
+    [ ]
+
+partialTimeOfDayFormats :: [FormatString TimeOfDay]
+partialTimeOfDayFormats = map FormatString
+    [ ]
+
+partialLocalTimeFormats :: [FormatString LocalTime]
+partialLocalTimeFormats = map FormatString
+    [ ]
+
+partialZonedTimeFormats :: [FormatString ZonedTime]
+partialZonedTimeFormats = map FormatString
+    [
+     -- %s does not include second decimals
+     "%s %z",
+     -- %S does not include second decimals
+     "%c", "%a, %d %b %Y %H:%M:%S %Z"
+    ]
+
+partialUTCTimeFormats :: [FormatString UTCTime]
+partialUTCTimeFormats = map FormatString
+    [
+     -- %s does not include second decimals
+     "%s",
+     -- %c does not include second decimals
+     "%c"
+    ]
+
+partialUniversalTimeFormats :: [FormatString UniversalTime]
+partialUniversalTimeFormats = map FormatString
+    [ ]
+
+failingPartialDayFormats :: [FormatString Day]
+failingPartialDayFormats = map FormatString
+    [ -- ISO week dates with two digit year.
+      -- This can fail in the beginning or the end of a year where
+      -- the ISO week date year does not match the gregorian year.
+     "%g-%V-%u","%g-%V-%a","%g-%V-%A","%g-%V-%w", "%A week %V, %g", "day %V, week %A, %g",
+     "%g-W%V-%u"
+    ]
diff --git a/test/main/Test/LocalTime/CalendarDiffTime.hs b/test/main/Test/LocalTime/CalendarDiffTime.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/LocalTime/CalendarDiffTime.hs
@@ -0,0 +1,18 @@
+module Test.LocalTime.CalendarDiffTime
+    ( testCalendarDiffTime
+    ) where
+
+--import Data.Time.LocalTime
+import Test.Arbitrary ()
+import Test.Tasty
+--import Test.Tasty.QuickCheck hiding (reason)
+
+--testReadShow :: TestTree
+--testReadShow = testProperty "read . show" $ \(t :: CalendarDiffTime) -> read (show t) == t
+
+testCalendarDiffTime :: TestTree
+testCalendarDiffTime =
+    testGroup
+        "CalendarDiffTime"
+        [ --testReadShow
+        ]
diff --git a/test/main/Test/LocalTime/Time.hs b/test/main/Test/LocalTime/Time.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/LocalTime/Time.hs
@@ -0,0 +1,110 @@
+module Test.LocalTime.Time(testTime) where
+
+import Data.Time.Calendar.OrdinalDate.Compat
+import Data.Time.Calendar.WeekDate.Compat
+import Data.Time.Compat
+
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.LocalTime.TimeRef
+
+showCal :: Integer -> String
+showCal mjd
+  = let date    = ModifiedJulianDay mjd
+        (y,m,d) = toGregorian date
+        date' = fromGregorian y m d
+    in concat [ show mjd ++ "="
+                 ++ showGregorian date ++ "="
+                 ++ showOrdinalDate date ++ "="
+                 ++ showWeekDate date
+                 ++ "\n"
+
+               , if date == date'
+                   then ""
+                   else "=" ++ (show $ toModifiedJulianDay date') ++ "!" ]
+
+testCal :: String
+testCal
+  = concat
+        -- days around 1 BCE/1 CE
+      [ concatMap showCal [-678950 .. -678930]
+
+        -- days around 1000 CE
+      , concatMap showCal [-313710 .. -313690]
+
+        -- days around MJD zero
+      , concatMap showCal [-30..30]
+      , showCal 40000
+      , showCal 50000
+
+        -- 1900 not a leap year
+      , showCal 15078
+      , showCal 15079
+
+        -- 1980 is a leap year
+      , showCal 44297
+      , showCal 44298
+      , showCal 44299
+
+        -- 1990 not a leap year
+      , showCal 47950
+      , showCal 47951
+
+        -- 2000 is a leap year
+      , showCal 51602
+      , showCal 51603
+      , showCal 51604
+
+        -- years 2000 and 2001, plus some slop
+      , concatMap showCal [51540..52280] ]
+
+showUTCTime :: UTCTime -> String
+showUTCTime (UTCTime d t) =  show (toModifiedJulianDay d) ++ "," ++ show t
+
+myzone :: TimeZone
+myzone = hoursToTimeZone (- 8)
+
+leapSec1998Cal :: LocalTime
+leapSec1998Cal = LocalTime (fromGregorian 1998 12 31) (TimeOfDay 23 59 60.5)
+
+leapSec1998 :: UTCTime
+leapSec1998 = localTimeToUTC utc leapSec1998Cal
+
+testUTC :: String
+testUTC
+  = let lsMineCal = utcToLocalTime myzone leapSec1998
+        lsMine = localTimeToUTC myzone lsMineCal
+    in unlines [ showCal 51178
+           , show leapSec1998Cal
+           , showUTCTime leapSec1998
+           , show lsMineCal
+           , showUTCTime lsMine ]
+
+neglong :: Rational
+neglong = -120
+
+poslong :: Rational
+poslong = 120
+
+testUT1 :: String
+testUT1
+  = unlines [ show $ ut1ToLocalTime 0 $ ModJulianDate 51604.0
+            , show $ ut1ToLocalTime 0 $ ModJulianDate 51604.5
+            , show $ ut1ToLocalTime neglong $ ModJulianDate 51604.0
+            , show $ ut1ToLocalTime neglong $ ModJulianDate 51604.5
+            , show $ ut1ToLocalTime poslong $ ModJulianDate 51604.0
+            , show $ ut1ToLocalTime poslong $ ModJulianDate 51604.5 ]
+
+testTimeOfDayToDayFraction :: String
+testTimeOfDayToDayFraction
+  = let f = dayFractionToTimeOfDay . timeOfDayToDayFraction
+    in unlines [ show $ f $ TimeOfDay 12 34 56.789
+               , show $ f $ TimeOfDay 12 34 56.789123
+               , show $ f $ TimeOfDay 12 34 56.789123456
+               , show $ f $ TimeOfDay 12 34 56.789123456789
+--               , show $ f $ TimeOfDay minBound 0 0
+               ]
+
+testTime :: TestTree
+testTime = testCase "testTime" $
+    assertEqual "times" testTimeRef $ unlines [ testCal, testUTC, testUT1, testTimeOfDayToDayFraction]
diff --git a/test/main/Test/LocalTime/TimeOfDay.hs b/test/main/Test/LocalTime/TimeOfDay.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/LocalTime/TimeOfDay.hs
@@ -0,0 +1,23 @@
+module Test.LocalTime.TimeOfDay
+    ( testTimeOfDay
+    ) where
+
+import Data.Time.LocalTime.Compat
+
+import Test.Arbitrary ()
+import Test.Tasty
+import Test.Tasty.QuickCheck hiding (reason)
+
+testTimeOfDay :: TestTree
+testTimeOfDay =
+    testGroup
+        "TimeOfDay"
+        [ testProperty "daysAndTimeOfDayToTime . timeToDaysAndTimeOfDay" $ \ndt -> let
+              (d, tod) = timeToDaysAndTimeOfDay ndt
+              ndt' = daysAndTimeOfDayToTime d tod
+              in ndt' == ndt
+        , testProperty "timeOfDayToTime . timeToTimeOfDay" $ \dt -> let
+              tod = timeToTimeOfDay dt
+              dt' = timeOfDayToTime tod
+              in dt' == dt
+        ]
diff --git a/test/main/Test/LocalTime/TimeRef.hs b/test/main/Test/LocalTime/TimeRef.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/LocalTime/TimeRef.hs
@@ -0,0 +1,890 @@
+module Test.LocalTime.TimeRef where
+
+import Data.Int
+
+is64Bit :: Bool
+is64Bit =
+    if toInteger (maxBound :: Int) == toInteger (maxBound :: Int32) then False else
+    if toInteger (maxBound :: Int) == toInteger (maxBound :: Int64) then True else
+    error "unrecognised Int size"
+
+testTimeRef :: String
+testTimeRef =
+  unlines [
+  "-678950=-0001-12-23=-0001-357=-0001-W51-4"
+  ,"-678949=-0001-12-24=-0001-358=-0001-W51-5"
+  ,"-678948=-0001-12-25=-0001-359=-0001-W51-6"
+  ,"-678947=-0001-12-26=-0001-360=-0001-W51-7"
+  ,"-678946=-0001-12-27=-0001-361=-0001-W52-1"
+  ,"-678945=-0001-12-28=-0001-362=-0001-W52-2"
+  ,"-678944=-0001-12-29=-0001-363=-0001-W52-3"
+  ,"-678943=-0001-12-30=-0001-364=-0001-W52-4"
+  ,"-678942=-0001-12-31=-0001-365=-0001-W52-5"
+  ,"-678941=0000-01-01=0000-001=-0001-W52-6"
+  ,"-678940=0000-01-02=0000-002=-0001-W52-7"
+  ,"-678939=0000-01-03=0000-003=0000-W01-1"
+  ,"-678938=0000-01-04=0000-004=0000-W01-2"
+  ,"-678937=0000-01-05=0000-005=0000-W01-3"
+  ,"-678936=0000-01-06=0000-006=0000-W01-4"
+  ,"-678935=0000-01-07=0000-007=0000-W01-5"
+  ,"-678934=0000-01-08=0000-008=0000-W01-6"
+  ,"-678933=0000-01-09=0000-009=0000-W01-7"
+  ,"-678932=0000-01-10=0000-010=0000-W02-1"
+  ,"-678931=0000-01-11=0000-011=0000-W02-2"
+  ,"-678930=0000-01-12=0000-012=0000-W02-3"
+  ,"-313710=0999-12-20=0999-354=0999-W51-5"
+  ,"-313709=0999-12-21=0999-355=0999-W51-6"
+  ,"-313708=0999-12-22=0999-356=0999-W51-7"
+  ,"-313707=0999-12-23=0999-357=0999-W52-1"
+  ,"-313706=0999-12-24=0999-358=0999-W52-2"
+  ,"-313705=0999-12-25=0999-359=0999-W52-3"
+  ,"-313704=0999-12-26=0999-360=0999-W52-4"
+  ,"-313703=0999-12-27=0999-361=0999-W52-5"
+  ,"-313702=0999-12-28=0999-362=0999-W52-6"
+  ,"-313701=0999-12-29=0999-363=0999-W52-7"
+  ,"-313700=0999-12-30=0999-364=1000-W01-1"
+  ,"-313699=0999-12-31=0999-365=1000-W01-2"
+  ,"-313698=1000-01-01=1000-001=1000-W01-3"
+  ,"-313697=1000-01-02=1000-002=1000-W01-4"
+  ,"-313696=1000-01-03=1000-003=1000-W01-5"
+  ,"-313695=1000-01-04=1000-004=1000-W01-6"
+  ,"-313694=1000-01-05=1000-005=1000-W01-7"
+  ,"-313693=1000-01-06=1000-006=1000-W02-1"
+  ,"-313692=1000-01-07=1000-007=1000-W02-2"
+  ,"-313691=1000-01-08=1000-008=1000-W02-3"
+  ,"-313690=1000-01-09=1000-009=1000-W02-4"
+  ,"-30=1858-10-18=1858-291=1858-W42-1"
+  ,"-29=1858-10-19=1858-292=1858-W42-2"
+  ,"-28=1858-10-20=1858-293=1858-W42-3"
+  ,"-27=1858-10-21=1858-294=1858-W42-4"
+  ,"-26=1858-10-22=1858-295=1858-W42-5"
+  ,"-25=1858-10-23=1858-296=1858-W42-6"
+  ,"-24=1858-10-24=1858-297=1858-W42-7"
+  ,"-23=1858-10-25=1858-298=1858-W43-1"
+  ,"-22=1858-10-26=1858-299=1858-W43-2"
+  ,"-21=1858-10-27=1858-300=1858-W43-3"
+  ,"-20=1858-10-28=1858-301=1858-W43-4"
+  ,"-19=1858-10-29=1858-302=1858-W43-5"
+  ,"-18=1858-10-30=1858-303=1858-W43-6"
+  ,"-17=1858-10-31=1858-304=1858-W43-7"
+  ,"-16=1858-11-01=1858-305=1858-W44-1"
+  ,"-15=1858-11-02=1858-306=1858-W44-2"
+  ,"-14=1858-11-03=1858-307=1858-W44-3"
+  ,"-13=1858-11-04=1858-308=1858-W44-4"
+  ,"-12=1858-11-05=1858-309=1858-W44-5"
+  ,"-11=1858-11-06=1858-310=1858-W44-6"
+  ,"-10=1858-11-07=1858-311=1858-W44-7"
+  ,"-9=1858-11-08=1858-312=1858-W45-1"
+  ,"-8=1858-11-09=1858-313=1858-W45-2"
+  ,"-7=1858-11-10=1858-314=1858-W45-3"
+  ,"-6=1858-11-11=1858-315=1858-W45-4"
+  ,"-5=1858-11-12=1858-316=1858-W45-5"
+  ,"-4=1858-11-13=1858-317=1858-W45-6"
+  ,"-3=1858-11-14=1858-318=1858-W45-7"
+  ,"-2=1858-11-15=1858-319=1858-W46-1"
+  ,"-1=1858-11-16=1858-320=1858-W46-2"
+  ,"0=1858-11-17=1858-321=1858-W46-3"
+  ,"1=1858-11-18=1858-322=1858-W46-4"
+  ,"2=1858-11-19=1858-323=1858-W46-5"
+  ,"3=1858-11-20=1858-324=1858-W46-6"
+  ,"4=1858-11-21=1858-325=1858-W46-7"
+  ,"5=1858-11-22=1858-326=1858-W47-1"
+  ,"6=1858-11-23=1858-327=1858-W47-2"
+  ,"7=1858-11-24=1858-328=1858-W47-3"
+  ,"8=1858-11-25=1858-329=1858-W47-4"
+  ,"9=1858-11-26=1858-330=1858-W47-5"
+  ,"10=1858-11-27=1858-331=1858-W47-6"
+  ,"11=1858-11-28=1858-332=1858-W47-7"
+  ,"12=1858-11-29=1858-333=1858-W48-1"
+  ,"13=1858-11-30=1858-334=1858-W48-2"
+  ,"14=1858-12-01=1858-335=1858-W48-3"
+  ,"15=1858-12-02=1858-336=1858-W48-4"
+  ,"16=1858-12-03=1858-337=1858-W48-5"
+  ,"17=1858-12-04=1858-338=1858-W48-6"
+  ,"18=1858-12-05=1858-339=1858-W48-7"
+  ,"19=1858-12-06=1858-340=1858-W49-1"
+  ,"20=1858-12-07=1858-341=1858-W49-2"
+  ,"21=1858-12-08=1858-342=1858-W49-3"
+  ,"22=1858-12-09=1858-343=1858-W49-4"
+  ,"23=1858-12-10=1858-344=1858-W49-5"
+  ,"24=1858-12-11=1858-345=1858-W49-6"
+  ,"25=1858-12-12=1858-346=1858-W49-7"
+  ,"26=1858-12-13=1858-347=1858-W50-1"
+  ,"27=1858-12-14=1858-348=1858-W50-2"
+  ,"28=1858-12-15=1858-349=1858-W50-3"
+  ,"29=1858-12-16=1858-350=1858-W50-4"
+  ,"30=1858-12-17=1858-351=1858-W50-5"
+  ,"40000=1968-05-24=1968-145=1968-W21-5"
+  ,"50000=1995-10-10=1995-283=1995-W41-2"
+  ,"15078=1900-02-28=1900-059=1900-W09-3"
+  ,"15079=1900-03-01=1900-060=1900-W09-4"
+  ,"44297=1980-02-28=1980-059=1980-W09-4"
+  ,"44298=1980-02-29=1980-060=1980-W09-5"
+  ,"44299=1980-03-01=1980-061=1980-W09-6"
+  ,"47950=1990-02-28=1990-059=1990-W09-3"
+  ,"47951=1990-03-01=1990-060=1990-W09-4"
+  ,"51602=2000-02-28=2000-059=2000-W09-1"
+  ,"51603=2000-02-29=2000-060=2000-W09-2"
+  ,"51604=2000-03-01=2000-061=2000-W09-3"
+  ,"51540=1999-12-28=1999-362=1999-W52-2"
+  ,"51541=1999-12-29=1999-363=1999-W52-3"
+  ,"51542=1999-12-30=1999-364=1999-W52-4"
+  ,"51543=1999-12-31=1999-365=1999-W52-5"
+  ,"51544=2000-01-01=2000-001=1999-W52-6"
+  ,"51545=2000-01-02=2000-002=1999-W52-7"
+  ,"51546=2000-01-03=2000-003=2000-W01-1"
+  ,"51547=2000-01-04=2000-004=2000-W01-2"
+  ,"51548=2000-01-05=2000-005=2000-W01-3"
+  ,"51549=2000-01-06=2000-006=2000-W01-4"
+  ,"51550=2000-01-07=2000-007=2000-W01-5"
+  ,"51551=2000-01-08=2000-008=2000-W01-6"
+  ,"51552=2000-01-09=2000-009=2000-W01-7"
+  ,"51553=2000-01-10=2000-010=2000-W02-1"
+  ,"51554=2000-01-11=2000-011=2000-W02-2"
+  ,"51555=2000-01-12=2000-012=2000-W02-3"
+  ,"51556=2000-01-13=2000-013=2000-W02-4"
+  ,"51557=2000-01-14=2000-014=2000-W02-5"
+  ,"51558=2000-01-15=2000-015=2000-W02-6"
+  ,"51559=2000-01-16=2000-016=2000-W02-7"
+  ,"51560=2000-01-17=2000-017=2000-W03-1"
+  ,"51561=2000-01-18=2000-018=2000-W03-2"
+  ,"51562=2000-01-19=2000-019=2000-W03-3"
+  ,"51563=2000-01-20=2000-020=2000-W03-4"
+  ,"51564=2000-01-21=2000-021=2000-W03-5"
+  ,"51565=2000-01-22=2000-022=2000-W03-6"
+  ,"51566=2000-01-23=2000-023=2000-W03-7"
+  ,"51567=2000-01-24=2000-024=2000-W04-1"
+  ,"51568=2000-01-25=2000-025=2000-W04-2"
+  ,"51569=2000-01-26=2000-026=2000-W04-3"
+  ,"51570=2000-01-27=2000-027=2000-W04-4"
+  ,"51571=2000-01-28=2000-028=2000-W04-5"
+  ,"51572=2000-01-29=2000-029=2000-W04-6"
+  ,"51573=2000-01-30=2000-030=2000-W04-7"
+  ,"51574=2000-01-31=2000-031=2000-W05-1"
+  ,"51575=2000-02-01=2000-032=2000-W05-2"
+  ,"51576=2000-02-02=2000-033=2000-W05-3"
+  ,"51577=2000-02-03=2000-034=2000-W05-4"
+  ,"51578=2000-02-04=2000-035=2000-W05-5"
+  ,"51579=2000-02-05=2000-036=2000-W05-6"
+  ,"51580=2000-02-06=2000-037=2000-W05-7"
+  ,"51581=2000-02-07=2000-038=2000-W06-1"
+  ,"51582=2000-02-08=2000-039=2000-W06-2"
+  ,"51583=2000-02-09=2000-040=2000-W06-3"
+  ,"51584=2000-02-10=2000-041=2000-W06-4"
+  ,"51585=2000-02-11=2000-042=2000-W06-5"
+  ,"51586=2000-02-12=2000-043=2000-W06-6"
+  ,"51587=2000-02-13=2000-044=2000-W06-7"
+  ,"51588=2000-02-14=2000-045=2000-W07-1"
+  ,"51589=2000-02-15=2000-046=2000-W07-2"
+  ,"51590=2000-02-16=2000-047=2000-W07-3"
+  ,"51591=2000-02-17=2000-048=2000-W07-4"
+  ,"51592=2000-02-18=2000-049=2000-W07-5"
+  ,"51593=2000-02-19=2000-050=2000-W07-6"
+  ,"51594=2000-02-20=2000-051=2000-W07-7"
+  ,"51595=2000-02-21=2000-052=2000-W08-1"
+  ,"51596=2000-02-22=2000-053=2000-W08-2"
+  ,"51597=2000-02-23=2000-054=2000-W08-3"
+  ,"51598=2000-02-24=2000-055=2000-W08-4"
+  ,"51599=2000-02-25=2000-056=2000-W08-5"
+  ,"51600=2000-02-26=2000-057=2000-W08-6"
+  ,"51601=2000-02-27=2000-058=2000-W08-7"
+  ,"51602=2000-02-28=2000-059=2000-W09-1"
+  ,"51603=2000-02-29=2000-060=2000-W09-2"
+  ,"51604=2000-03-01=2000-061=2000-W09-3"
+  ,"51605=2000-03-02=2000-062=2000-W09-4"
+  ,"51606=2000-03-03=2000-063=2000-W09-5"
+  ,"51607=2000-03-04=2000-064=2000-W09-6"
+  ,"51608=2000-03-05=2000-065=2000-W09-7"
+  ,"51609=2000-03-06=2000-066=2000-W10-1"
+  ,"51610=2000-03-07=2000-067=2000-W10-2"
+  ,"51611=2000-03-08=2000-068=2000-W10-3"
+  ,"51612=2000-03-09=2000-069=2000-W10-4"
+  ,"51613=2000-03-10=2000-070=2000-W10-5"
+  ,"51614=2000-03-11=2000-071=2000-W10-6"
+  ,"51615=2000-03-12=2000-072=2000-W10-7"
+  ,"51616=2000-03-13=2000-073=2000-W11-1"
+  ,"51617=2000-03-14=2000-074=2000-W11-2"
+  ,"51618=2000-03-15=2000-075=2000-W11-3"
+  ,"51619=2000-03-16=2000-076=2000-W11-4"
+  ,"51620=2000-03-17=2000-077=2000-W11-5"
+  ,"51621=2000-03-18=2000-078=2000-W11-6"
+  ,"51622=2000-03-19=2000-079=2000-W11-7"
+  ,"51623=2000-03-20=2000-080=2000-W12-1"
+  ,"51624=2000-03-21=2000-081=2000-W12-2"
+  ,"51625=2000-03-22=2000-082=2000-W12-3"
+  ,"51626=2000-03-23=2000-083=2000-W12-4"
+  ,"51627=2000-03-24=2000-084=2000-W12-5"
+  ,"51628=2000-03-25=2000-085=2000-W12-6"
+  ,"51629=2000-03-26=2000-086=2000-W12-7"
+  ,"51630=2000-03-27=2000-087=2000-W13-1"
+  ,"51631=2000-03-28=2000-088=2000-W13-2"
+  ,"51632=2000-03-29=2000-089=2000-W13-3"
+  ,"51633=2000-03-30=2000-090=2000-W13-4"
+  ,"51634=2000-03-31=2000-091=2000-W13-5"
+  ,"51635=2000-04-01=2000-092=2000-W13-6"
+  ,"51636=2000-04-02=2000-093=2000-W13-7"
+  ,"51637=2000-04-03=2000-094=2000-W14-1"
+  ,"51638=2000-04-04=2000-095=2000-W14-2"
+  ,"51639=2000-04-05=2000-096=2000-W14-3"
+  ,"51640=2000-04-06=2000-097=2000-W14-4"
+  ,"51641=2000-04-07=2000-098=2000-W14-5"
+  ,"51642=2000-04-08=2000-099=2000-W14-6"
+  ,"51643=2000-04-09=2000-100=2000-W14-7"
+  ,"51644=2000-04-10=2000-101=2000-W15-1"
+  ,"51645=2000-04-11=2000-102=2000-W15-2"
+  ,"51646=2000-04-12=2000-103=2000-W15-3"
+  ,"51647=2000-04-13=2000-104=2000-W15-4"
+  ,"51648=2000-04-14=2000-105=2000-W15-5"
+  ,"51649=2000-04-15=2000-106=2000-W15-6"
+  ,"51650=2000-04-16=2000-107=2000-W15-7"
+  ,"51651=2000-04-17=2000-108=2000-W16-1"
+  ,"51652=2000-04-18=2000-109=2000-W16-2"
+  ,"51653=2000-04-19=2000-110=2000-W16-3"
+  ,"51654=2000-04-20=2000-111=2000-W16-4"
+  ,"51655=2000-04-21=2000-112=2000-W16-5"
+  ,"51656=2000-04-22=2000-113=2000-W16-6"
+  ,"51657=2000-04-23=2000-114=2000-W16-7"
+  ,"51658=2000-04-24=2000-115=2000-W17-1"
+  ,"51659=2000-04-25=2000-116=2000-W17-2"
+  ,"51660=2000-04-26=2000-117=2000-W17-3"
+  ,"51661=2000-04-27=2000-118=2000-W17-4"
+  ,"51662=2000-04-28=2000-119=2000-W17-5"
+  ,"51663=2000-04-29=2000-120=2000-W17-6"
+  ,"51664=2000-04-30=2000-121=2000-W17-7"
+  ,"51665=2000-05-01=2000-122=2000-W18-1"
+  ,"51666=2000-05-02=2000-123=2000-W18-2"
+  ,"51667=2000-05-03=2000-124=2000-W18-3"
+  ,"51668=2000-05-04=2000-125=2000-W18-4"
+  ,"51669=2000-05-05=2000-126=2000-W18-5"
+  ,"51670=2000-05-06=2000-127=2000-W18-6"
+  ,"51671=2000-05-07=2000-128=2000-W18-7"
+  ,"51672=2000-05-08=2000-129=2000-W19-1"
+  ,"51673=2000-05-09=2000-130=2000-W19-2"
+  ,"51674=2000-05-10=2000-131=2000-W19-3"
+  ,"51675=2000-05-11=2000-132=2000-W19-4"
+  ,"51676=2000-05-12=2000-133=2000-W19-5"
+  ,"51677=2000-05-13=2000-134=2000-W19-6"
+  ,"51678=2000-05-14=2000-135=2000-W19-7"
+  ,"51679=2000-05-15=2000-136=2000-W20-1"
+  ,"51680=2000-05-16=2000-137=2000-W20-2"
+  ,"51681=2000-05-17=2000-138=2000-W20-3"
+  ,"51682=2000-05-18=2000-139=2000-W20-4"
+  ,"51683=2000-05-19=2000-140=2000-W20-5"
+  ,"51684=2000-05-20=2000-141=2000-W20-6"
+  ,"51685=2000-05-21=2000-142=2000-W20-7"
+  ,"51686=2000-05-22=2000-143=2000-W21-1"
+  ,"51687=2000-05-23=2000-144=2000-W21-2"
+  ,"51688=2000-05-24=2000-145=2000-W21-3"
+  ,"51689=2000-05-25=2000-146=2000-W21-4"
+  ,"51690=2000-05-26=2000-147=2000-W21-5"
+  ,"51691=2000-05-27=2000-148=2000-W21-6"
+  ,"51692=2000-05-28=2000-149=2000-W21-7"
+  ,"51693=2000-05-29=2000-150=2000-W22-1"
+  ,"51694=2000-05-30=2000-151=2000-W22-2"
+  ,"51695=2000-05-31=2000-152=2000-W22-3"
+  ,"51696=2000-06-01=2000-153=2000-W22-4"
+  ,"51697=2000-06-02=2000-154=2000-W22-5"
+  ,"51698=2000-06-03=2000-155=2000-W22-6"
+  ,"51699=2000-06-04=2000-156=2000-W22-7"
+  ,"51700=2000-06-05=2000-157=2000-W23-1"
+  ,"51701=2000-06-06=2000-158=2000-W23-2"
+  ,"51702=2000-06-07=2000-159=2000-W23-3"
+  ,"51703=2000-06-08=2000-160=2000-W23-4"
+  ,"51704=2000-06-09=2000-161=2000-W23-5"
+  ,"51705=2000-06-10=2000-162=2000-W23-6"
+  ,"51706=2000-06-11=2000-163=2000-W23-7"
+  ,"51707=2000-06-12=2000-164=2000-W24-1"
+  ,"51708=2000-06-13=2000-165=2000-W24-2"
+  ,"51709=2000-06-14=2000-166=2000-W24-3"
+  ,"51710=2000-06-15=2000-167=2000-W24-4"
+  ,"51711=2000-06-16=2000-168=2000-W24-5"
+  ,"51712=2000-06-17=2000-169=2000-W24-6"
+  ,"51713=2000-06-18=2000-170=2000-W24-7"
+  ,"51714=2000-06-19=2000-171=2000-W25-1"
+  ,"51715=2000-06-20=2000-172=2000-W25-2"
+  ,"51716=2000-06-21=2000-173=2000-W25-3"
+  ,"51717=2000-06-22=2000-174=2000-W25-4"
+  ,"51718=2000-06-23=2000-175=2000-W25-5"
+  ,"51719=2000-06-24=2000-176=2000-W25-6"
+  ,"51720=2000-06-25=2000-177=2000-W25-7"
+  ,"51721=2000-06-26=2000-178=2000-W26-1"
+  ,"51722=2000-06-27=2000-179=2000-W26-2"
+  ,"51723=2000-06-28=2000-180=2000-W26-3"
+  ,"51724=2000-06-29=2000-181=2000-W26-4"
+  ,"51725=2000-06-30=2000-182=2000-W26-5"
+  ,"51726=2000-07-01=2000-183=2000-W26-6"
+  ,"51727=2000-07-02=2000-184=2000-W26-7"
+  ,"51728=2000-07-03=2000-185=2000-W27-1"
+  ,"51729=2000-07-04=2000-186=2000-W27-2"
+  ,"51730=2000-07-05=2000-187=2000-W27-3"
+  ,"51731=2000-07-06=2000-188=2000-W27-4"
+  ,"51732=2000-07-07=2000-189=2000-W27-5"
+  ,"51733=2000-07-08=2000-190=2000-W27-6"
+  ,"51734=2000-07-09=2000-191=2000-W27-7"
+  ,"51735=2000-07-10=2000-192=2000-W28-1"
+  ,"51736=2000-07-11=2000-193=2000-W28-2"
+  ,"51737=2000-07-12=2000-194=2000-W28-3"
+  ,"51738=2000-07-13=2000-195=2000-W28-4"
+  ,"51739=2000-07-14=2000-196=2000-W28-5"
+  ,"51740=2000-07-15=2000-197=2000-W28-6"
+  ,"51741=2000-07-16=2000-198=2000-W28-7"
+  ,"51742=2000-07-17=2000-199=2000-W29-1"
+  ,"51743=2000-07-18=2000-200=2000-W29-2"
+  ,"51744=2000-07-19=2000-201=2000-W29-3"
+  ,"51745=2000-07-20=2000-202=2000-W29-4"
+  ,"51746=2000-07-21=2000-203=2000-W29-5"
+  ,"51747=2000-07-22=2000-204=2000-W29-6"
+  ,"51748=2000-07-23=2000-205=2000-W29-7"
+  ,"51749=2000-07-24=2000-206=2000-W30-1"
+  ,"51750=2000-07-25=2000-207=2000-W30-2"
+  ,"51751=2000-07-26=2000-208=2000-W30-3"
+  ,"51752=2000-07-27=2000-209=2000-W30-4"
+  ,"51753=2000-07-28=2000-210=2000-W30-5"
+  ,"51754=2000-07-29=2000-211=2000-W30-6"
+  ,"51755=2000-07-30=2000-212=2000-W30-7"
+  ,"51756=2000-07-31=2000-213=2000-W31-1"
+  ,"51757=2000-08-01=2000-214=2000-W31-2"
+  ,"51758=2000-08-02=2000-215=2000-W31-3"
+  ,"51759=2000-08-03=2000-216=2000-W31-4"
+  ,"51760=2000-08-04=2000-217=2000-W31-5"
+  ,"51761=2000-08-05=2000-218=2000-W31-6"
+  ,"51762=2000-08-06=2000-219=2000-W31-7"
+  ,"51763=2000-08-07=2000-220=2000-W32-1"
+  ,"51764=2000-08-08=2000-221=2000-W32-2"
+  ,"51765=2000-08-09=2000-222=2000-W32-3"
+  ,"51766=2000-08-10=2000-223=2000-W32-4"
+  ,"51767=2000-08-11=2000-224=2000-W32-5"
+  ,"51768=2000-08-12=2000-225=2000-W32-6"
+  ,"51769=2000-08-13=2000-226=2000-W32-7"
+  ,"51770=2000-08-14=2000-227=2000-W33-1"
+  ,"51771=2000-08-15=2000-228=2000-W33-2"
+  ,"51772=2000-08-16=2000-229=2000-W33-3"
+  ,"51773=2000-08-17=2000-230=2000-W33-4"
+  ,"51774=2000-08-18=2000-231=2000-W33-5"
+  ,"51775=2000-08-19=2000-232=2000-W33-6"
+  ,"51776=2000-08-20=2000-233=2000-W33-7"
+  ,"51777=2000-08-21=2000-234=2000-W34-1"
+  ,"51778=2000-08-22=2000-235=2000-W34-2"
+  ,"51779=2000-08-23=2000-236=2000-W34-3"
+  ,"51780=2000-08-24=2000-237=2000-W34-4"
+  ,"51781=2000-08-25=2000-238=2000-W34-5"
+  ,"51782=2000-08-26=2000-239=2000-W34-6"
+  ,"51783=2000-08-27=2000-240=2000-W34-7"
+  ,"51784=2000-08-28=2000-241=2000-W35-1"
+  ,"51785=2000-08-29=2000-242=2000-W35-2"
+  ,"51786=2000-08-30=2000-243=2000-W35-3"
+  ,"51787=2000-08-31=2000-244=2000-W35-4"
+  ,"51788=2000-09-01=2000-245=2000-W35-5"
+  ,"51789=2000-09-02=2000-246=2000-W35-6"
+  ,"51790=2000-09-03=2000-247=2000-W35-7"
+  ,"51791=2000-09-04=2000-248=2000-W36-1"
+  ,"51792=2000-09-05=2000-249=2000-W36-2"
+  ,"51793=2000-09-06=2000-250=2000-W36-3"
+  ,"51794=2000-09-07=2000-251=2000-W36-4"
+  ,"51795=2000-09-08=2000-252=2000-W36-5"
+  ,"51796=2000-09-09=2000-253=2000-W36-6"
+  ,"51797=2000-09-10=2000-254=2000-W36-7"
+  ,"51798=2000-09-11=2000-255=2000-W37-1"
+  ,"51799=2000-09-12=2000-256=2000-W37-2"
+  ,"51800=2000-09-13=2000-257=2000-W37-3"
+  ,"51801=2000-09-14=2000-258=2000-W37-4"
+  ,"51802=2000-09-15=2000-259=2000-W37-5"
+  ,"51803=2000-09-16=2000-260=2000-W37-6"
+  ,"51804=2000-09-17=2000-261=2000-W37-7"
+  ,"51805=2000-09-18=2000-262=2000-W38-1"
+  ,"51806=2000-09-19=2000-263=2000-W38-2"
+  ,"51807=2000-09-20=2000-264=2000-W38-3"
+  ,"51808=2000-09-21=2000-265=2000-W38-4"
+  ,"51809=2000-09-22=2000-266=2000-W38-5"
+  ,"51810=2000-09-23=2000-267=2000-W38-6"
+  ,"51811=2000-09-24=2000-268=2000-W38-7"
+  ,"51812=2000-09-25=2000-269=2000-W39-1"
+  ,"51813=2000-09-26=2000-270=2000-W39-2"
+  ,"51814=2000-09-27=2000-271=2000-W39-3"
+  ,"51815=2000-09-28=2000-272=2000-W39-4"
+  ,"51816=2000-09-29=2000-273=2000-W39-5"
+  ,"51817=2000-09-30=2000-274=2000-W39-6"
+  ,"51818=2000-10-01=2000-275=2000-W39-7"
+  ,"51819=2000-10-02=2000-276=2000-W40-1"
+  ,"51820=2000-10-03=2000-277=2000-W40-2"
+  ,"51821=2000-10-04=2000-278=2000-W40-3"
+  ,"51822=2000-10-05=2000-279=2000-W40-4"
+  ,"51823=2000-10-06=2000-280=2000-W40-5"
+  ,"51824=2000-10-07=2000-281=2000-W40-6"
+  ,"51825=2000-10-08=2000-282=2000-W40-7"
+  ,"51826=2000-10-09=2000-283=2000-W41-1"
+  ,"51827=2000-10-10=2000-284=2000-W41-2"
+  ,"51828=2000-10-11=2000-285=2000-W41-3"
+  ,"51829=2000-10-12=2000-286=2000-W41-4"
+  ,"51830=2000-10-13=2000-287=2000-W41-5"
+  ,"51831=2000-10-14=2000-288=2000-W41-6"
+  ,"51832=2000-10-15=2000-289=2000-W41-7"
+  ,"51833=2000-10-16=2000-290=2000-W42-1"
+  ,"51834=2000-10-17=2000-291=2000-W42-2"
+  ,"51835=2000-10-18=2000-292=2000-W42-3"
+  ,"51836=2000-10-19=2000-293=2000-W42-4"
+  ,"51837=2000-10-20=2000-294=2000-W42-5"
+  ,"51838=2000-10-21=2000-295=2000-W42-6"
+  ,"51839=2000-10-22=2000-296=2000-W42-7"
+  ,"51840=2000-10-23=2000-297=2000-W43-1"
+  ,"51841=2000-10-24=2000-298=2000-W43-2"
+  ,"51842=2000-10-25=2000-299=2000-W43-3"
+  ,"51843=2000-10-26=2000-300=2000-W43-4"
+  ,"51844=2000-10-27=2000-301=2000-W43-5"
+  ,"51845=2000-10-28=2000-302=2000-W43-6"
+  ,"51846=2000-10-29=2000-303=2000-W43-7"
+  ,"51847=2000-10-30=2000-304=2000-W44-1"
+  ,"51848=2000-10-31=2000-305=2000-W44-2"
+  ,"51849=2000-11-01=2000-306=2000-W44-3"
+  ,"51850=2000-11-02=2000-307=2000-W44-4"
+  ,"51851=2000-11-03=2000-308=2000-W44-5"
+  ,"51852=2000-11-04=2000-309=2000-W44-6"
+  ,"51853=2000-11-05=2000-310=2000-W44-7"
+  ,"51854=2000-11-06=2000-311=2000-W45-1"
+  ,"51855=2000-11-07=2000-312=2000-W45-2"
+  ,"51856=2000-11-08=2000-313=2000-W45-3"
+  ,"51857=2000-11-09=2000-314=2000-W45-4"
+  ,"51858=2000-11-10=2000-315=2000-W45-5"
+  ,"51859=2000-11-11=2000-316=2000-W45-6"
+  ,"51860=2000-11-12=2000-317=2000-W45-7"
+  ,"51861=2000-11-13=2000-318=2000-W46-1"
+  ,"51862=2000-11-14=2000-319=2000-W46-2"
+  ,"51863=2000-11-15=2000-320=2000-W46-3"
+  ,"51864=2000-11-16=2000-321=2000-W46-4"
+  ,"51865=2000-11-17=2000-322=2000-W46-5"
+  ,"51866=2000-11-18=2000-323=2000-W46-6"
+  ,"51867=2000-11-19=2000-324=2000-W46-7"
+  ,"51868=2000-11-20=2000-325=2000-W47-1"
+  ,"51869=2000-11-21=2000-326=2000-W47-2"
+  ,"51870=2000-11-22=2000-327=2000-W47-3"
+  ,"51871=2000-11-23=2000-328=2000-W47-4"
+  ,"51872=2000-11-24=2000-329=2000-W47-5"
+  ,"51873=2000-11-25=2000-330=2000-W47-6"
+  ,"51874=2000-11-26=2000-331=2000-W47-7"
+  ,"51875=2000-11-27=2000-332=2000-W48-1"
+  ,"51876=2000-11-28=2000-333=2000-W48-2"
+  ,"51877=2000-11-29=2000-334=2000-W48-3"
+  ,"51878=2000-11-30=2000-335=2000-W48-4"
+  ,"51879=2000-12-01=2000-336=2000-W48-5"
+  ,"51880=2000-12-02=2000-337=2000-W48-6"
+  ,"51881=2000-12-03=2000-338=2000-W48-7"
+  ,"51882=2000-12-04=2000-339=2000-W49-1"
+  ,"51883=2000-12-05=2000-340=2000-W49-2"
+  ,"51884=2000-12-06=2000-341=2000-W49-3"
+  ,"51885=2000-12-07=2000-342=2000-W49-4"
+  ,"51886=2000-12-08=2000-343=2000-W49-5"
+  ,"51887=2000-12-09=2000-344=2000-W49-6"
+  ,"51888=2000-12-10=2000-345=2000-W49-7"
+  ,"51889=2000-12-11=2000-346=2000-W50-1"
+  ,"51890=2000-12-12=2000-347=2000-W50-2"
+  ,"51891=2000-12-13=2000-348=2000-W50-3"
+  ,"51892=2000-12-14=2000-349=2000-W50-4"
+  ,"51893=2000-12-15=2000-350=2000-W50-5"
+  ,"51894=2000-12-16=2000-351=2000-W50-6"
+  ,"51895=2000-12-17=2000-352=2000-W50-7"
+  ,"51896=2000-12-18=2000-353=2000-W51-1"
+  ,"51897=2000-12-19=2000-354=2000-W51-2"
+  ,"51898=2000-12-20=2000-355=2000-W51-3"
+  ,"51899=2000-12-21=2000-356=2000-W51-4"
+  ,"51900=2000-12-22=2000-357=2000-W51-5"
+  ,"51901=2000-12-23=2000-358=2000-W51-6"
+  ,"51902=2000-12-24=2000-359=2000-W51-7"
+  ,"51903=2000-12-25=2000-360=2000-W52-1"
+  ,"51904=2000-12-26=2000-361=2000-W52-2"
+  ,"51905=2000-12-27=2000-362=2000-W52-3"
+  ,"51906=2000-12-28=2000-363=2000-W52-4"
+  ,"51907=2000-12-29=2000-364=2000-W52-5"
+  ,"51908=2000-12-30=2000-365=2000-W52-6"
+  ,"51909=2000-12-31=2000-366=2000-W52-7"
+  ,"51910=2001-01-01=2001-001=2001-W01-1"
+  ,"51911=2001-01-02=2001-002=2001-W01-2"
+  ,"51912=2001-01-03=2001-003=2001-W01-3"
+  ,"51913=2001-01-04=2001-004=2001-W01-4"
+  ,"51914=2001-01-05=2001-005=2001-W01-5"
+  ,"51915=2001-01-06=2001-006=2001-W01-6"
+  ,"51916=2001-01-07=2001-007=2001-W01-7"
+  ,"51917=2001-01-08=2001-008=2001-W02-1"
+  ,"51918=2001-01-09=2001-009=2001-W02-2"
+  ,"51919=2001-01-10=2001-010=2001-W02-3"
+  ,"51920=2001-01-11=2001-011=2001-W02-4"
+  ,"51921=2001-01-12=2001-012=2001-W02-5"
+  ,"51922=2001-01-13=2001-013=2001-W02-6"
+  ,"51923=2001-01-14=2001-014=2001-W02-7"
+  ,"51924=2001-01-15=2001-015=2001-W03-1"
+  ,"51925=2001-01-16=2001-016=2001-W03-2"
+  ,"51926=2001-01-17=2001-017=2001-W03-3"
+  ,"51927=2001-01-18=2001-018=2001-W03-4"
+  ,"51928=2001-01-19=2001-019=2001-W03-5"
+  ,"51929=2001-01-20=2001-020=2001-W03-6"
+  ,"51930=2001-01-21=2001-021=2001-W03-7"
+  ,"51931=2001-01-22=2001-022=2001-W04-1"
+  ,"51932=2001-01-23=2001-023=2001-W04-2"
+  ,"51933=2001-01-24=2001-024=2001-W04-3"
+  ,"51934=2001-01-25=2001-025=2001-W04-4"
+  ,"51935=2001-01-26=2001-026=2001-W04-5"
+  ,"51936=2001-01-27=2001-027=2001-W04-6"
+  ,"51937=2001-01-28=2001-028=2001-W04-7"
+  ,"51938=2001-01-29=2001-029=2001-W05-1"
+  ,"51939=2001-01-30=2001-030=2001-W05-2"
+  ,"51940=2001-01-31=2001-031=2001-W05-3"
+  ,"51941=2001-02-01=2001-032=2001-W05-4"
+  ,"51942=2001-02-02=2001-033=2001-W05-5"
+  ,"51943=2001-02-03=2001-034=2001-W05-6"
+  ,"51944=2001-02-04=2001-035=2001-W05-7"
+  ,"51945=2001-02-05=2001-036=2001-W06-1"
+  ,"51946=2001-02-06=2001-037=2001-W06-2"
+  ,"51947=2001-02-07=2001-038=2001-W06-3"
+  ,"51948=2001-02-08=2001-039=2001-W06-4"
+  ,"51949=2001-02-09=2001-040=2001-W06-5"
+  ,"51950=2001-02-10=2001-041=2001-W06-6"
+  ,"51951=2001-02-11=2001-042=2001-W06-7"
+  ,"51952=2001-02-12=2001-043=2001-W07-1"
+  ,"51953=2001-02-13=2001-044=2001-W07-2"
+  ,"51954=2001-02-14=2001-045=2001-W07-3"
+  ,"51955=2001-02-15=2001-046=2001-W07-4"
+  ,"51956=2001-02-16=2001-047=2001-W07-5"
+  ,"51957=2001-02-17=2001-048=2001-W07-6"
+  ,"51958=2001-02-18=2001-049=2001-W07-7"
+  ,"51959=2001-02-19=2001-050=2001-W08-1"
+  ,"51960=2001-02-20=2001-051=2001-W08-2"
+  ,"51961=2001-02-21=2001-052=2001-W08-3"
+  ,"51962=2001-02-22=2001-053=2001-W08-4"
+  ,"51963=2001-02-23=2001-054=2001-W08-5"
+  ,"51964=2001-02-24=2001-055=2001-W08-6"
+  ,"51965=2001-02-25=2001-056=2001-W08-7"
+  ,"51966=2001-02-26=2001-057=2001-W09-1"
+  ,"51967=2001-02-27=2001-058=2001-W09-2"
+  ,"51968=2001-02-28=2001-059=2001-W09-3"
+  ,"51969=2001-03-01=2001-060=2001-W09-4"
+  ,"51970=2001-03-02=2001-061=2001-W09-5"
+  ,"51971=2001-03-03=2001-062=2001-W09-6"
+  ,"51972=2001-03-04=2001-063=2001-W09-7"
+  ,"51973=2001-03-05=2001-064=2001-W10-1"
+  ,"51974=2001-03-06=2001-065=2001-W10-2"
+  ,"51975=2001-03-07=2001-066=2001-W10-3"
+  ,"51976=2001-03-08=2001-067=2001-W10-4"
+  ,"51977=2001-03-09=2001-068=2001-W10-5"
+  ,"51978=2001-03-10=2001-069=2001-W10-6"
+  ,"51979=2001-03-11=2001-070=2001-W10-7"
+  ,"51980=2001-03-12=2001-071=2001-W11-1"
+  ,"51981=2001-03-13=2001-072=2001-W11-2"
+  ,"51982=2001-03-14=2001-073=2001-W11-3"
+  ,"51983=2001-03-15=2001-074=2001-W11-4"
+  ,"51984=2001-03-16=2001-075=2001-W11-5"
+  ,"51985=2001-03-17=2001-076=2001-W11-6"
+  ,"51986=2001-03-18=2001-077=2001-W11-7"
+  ,"51987=2001-03-19=2001-078=2001-W12-1"
+  ,"51988=2001-03-20=2001-079=2001-W12-2"
+  ,"51989=2001-03-21=2001-080=2001-W12-3"
+  ,"51990=2001-03-22=2001-081=2001-W12-4"
+  ,"51991=2001-03-23=2001-082=2001-W12-5"
+  ,"51992=2001-03-24=2001-083=2001-W12-6"
+  ,"51993=2001-03-25=2001-084=2001-W12-7"
+  ,"51994=2001-03-26=2001-085=2001-W13-1"
+  ,"51995=2001-03-27=2001-086=2001-W13-2"
+  ,"51996=2001-03-28=2001-087=2001-W13-3"
+  ,"51997=2001-03-29=2001-088=2001-W13-4"
+  ,"51998=2001-03-30=2001-089=2001-W13-5"
+  ,"51999=2001-03-31=2001-090=2001-W13-6"
+  ,"52000=2001-04-01=2001-091=2001-W13-7"
+  ,"52001=2001-04-02=2001-092=2001-W14-1"
+  ,"52002=2001-04-03=2001-093=2001-W14-2"
+  ,"52003=2001-04-04=2001-094=2001-W14-3"
+  ,"52004=2001-04-05=2001-095=2001-W14-4"
+  ,"52005=2001-04-06=2001-096=2001-W14-5"
+  ,"52006=2001-04-07=2001-097=2001-W14-6"
+  ,"52007=2001-04-08=2001-098=2001-W14-7"
+  ,"52008=2001-04-09=2001-099=2001-W15-1"
+  ,"52009=2001-04-10=2001-100=2001-W15-2"
+  ,"52010=2001-04-11=2001-101=2001-W15-3"
+  ,"52011=2001-04-12=2001-102=2001-W15-4"
+  ,"52012=2001-04-13=2001-103=2001-W15-5"
+  ,"52013=2001-04-14=2001-104=2001-W15-6"
+  ,"52014=2001-04-15=2001-105=2001-W15-7"
+  ,"52015=2001-04-16=2001-106=2001-W16-1"
+  ,"52016=2001-04-17=2001-107=2001-W16-2"
+  ,"52017=2001-04-18=2001-108=2001-W16-3"
+  ,"52018=2001-04-19=2001-109=2001-W16-4"
+  ,"52019=2001-04-20=2001-110=2001-W16-5"
+  ,"52020=2001-04-21=2001-111=2001-W16-6"
+  ,"52021=2001-04-22=2001-112=2001-W16-7"
+  ,"52022=2001-04-23=2001-113=2001-W17-1"
+  ,"52023=2001-04-24=2001-114=2001-W17-2"
+  ,"52024=2001-04-25=2001-115=2001-W17-3"
+  ,"52025=2001-04-26=2001-116=2001-W17-4"
+  ,"52026=2001-04-27=2001-117=2001-W17-5"
+  ,"52027=2001-04-28=2001-118=2001-W17-6"
+  ,"52028=2001-04-29=2001-119=2001-W17-7"
+  ,"52029=2001-04-30=2001-120=2001-W18-1"
+  ,"52030=2001-05-01=2001-121=2001-W18-2"
+  ,"52031=2001-05-02=2001-122=2001-W18-3"
+  ,"52032=2001-05-03=2001-123=2001-W18-4"
+  ,"52033=2001-05-04=2001-124=2001-W18-5"
+  ,"52034=2001-05-05=2001-125=2001-W18-6"
+  ,"52035=2001-05-06=2001-126=2001-W18-7"
+  ,"52036=2001-05-07=2001-127=2001-W19-1"
+  ,"52037=2001-05-08=2001-128=2001-W19-2"
+  ,"52038=2001-05-09=2001-129=2001-W19-3"
+  ,"52039=2001-05-10=2001-130=2001-W19-4"
+  ,"52040=2001-05-11=2001-131=2001-W19-5"
+  ,"52041=2001-05-12=2001-132=2001-W19-6"
+  ,"52042=2001-05-13=2001-133=2001-W19-7"
+  ,"52043=2001-05-14=2001-134=2001-W20-1"
+  ,"52044=2001-05-15=2001-135=2001-W20-2"
+  ,"52045=2001-05-16=2001-136=2001-W20-3"
+  ,"52046=2001-05-17=2001-137=2001-W20-4"
+  ,"52047=2001-05-18=2001-138=2001-W20-5"
+  ,"52048=2001-05-19=2001-139=2001-W20-6"
+  ,"52049=2001-05-20=2001-140=2001-W20-7"
+  ,"52050=2001-05-21=2001-141=2001-W21-1"
+  ,"52051=2001-05-22=2001-142=2001-W21-2"
+  ,"52052=2001-05-23=2001-143=2001-W21-3"
+  ,"52053=2001-05-24=2001-144=2001-W21-4"
+  ,"52054=2001-05-25=2001-145=2001-W21-5"
+  ,"52055=2001-05-26=2001-146=2001-W21-6"
+  ,"52056=2001-05-27=2001-147=2001-W21-7"
+  ,"52057=2001-05-28=2001-148=2001-W22-1"
+  ,"52058=2001-05-29=2001-149=2001-W22-2"
+  ,"52059=2001-05-30=2001-150=2001-W22-3"
+  ,"52060=2001-05-31=2001-151=2001-W22-4"
+  ,"52061=2001-06-01=2001-152=2001-W22-5"
+  ,"52062=2001-06-02=2001-153=2001-W22-6"
+  ,"52063=2001-06-03=2001-154=2001-W22-7"
+  ,"52064=2001-06-04=2001-155=2001-W23-1"
+  ,"52065=2001-06-05=2001-156=2001-W23-2"
+  ,"52066=2001-06-06=2001-157=2001-W23-3"
+  ,"52067=2001-06-07=2001-158=2001-W23-4"
+  ,"52068=2001-06-08=2001-159=2001-W23-5"
+  ,"52069=2001-06-09=2001-160=2001-W23-6"
+  ,"52070=2001-06-10=2001-161=2001-W23-7"
+  ,"52071=2001-06-11=2001-162=2001-W24-1"
+  ,"52072=2001-06-12=2001-163=2001-W24-2"
+  ,"52073=2001-06-13=2001-164=2001-W24-3"
+  ,"52074=2001-06-14=2001-165=2001-W24-4"
+  ,"52075=2001-06-15=2001-166=2001-W24-5"
+  ,"52076=2001-06-16=2001-167=2001-W24-6"
+  ,"52077=2001-06-17=2001-168=2001-W24-7"
+  ,"52078=2001-06-18=2001-169=2001-W25-1"
+  ,"52079=2001-06-19=2001-170=2001-W25-2"
+  ,"52080=2001-06-20=2001-171=2001-W25-3"
+  ,"52081=2001-06-21=2001-172=2001-W25-4"
+  ,"52082=2001-06-22=2001-173=2001-W25-5"
+  ,"52083=2001-06-23=2001-174=2001-W25-6"
+  ,"52084=2001-06-24=2001-175=2001-W25-7"
+  ,"52085=2001-06-25=2001-176=2001-W26-1"
+  ,"52086=2001-06-26=2001-177=2001-W26-2"
+  ,"52087=2001-06-27=2001-178=2001-W26-3"
+  ,"52088=2001-06-28=2001-179=2001-W26-4"
+  ,"52089=2001-06-29=2001-180=2001-W26-5"
+  ,"52090=2001-06-30=2001-181=2001-W26-6"
+  ,"52091=2001-07-01=2001-182=2001-W26-7"
+  ,"52092=2001-07-02=2001-183=2001-W27-1"
+  ,"52093=2001-07-03=2001-184=2001-W27-2"
+  ,"52094=2001-07-04=2001-185=2001-W27-3"
+  ,"52095=2001-07-05=2001-186=2001-W27-4"
+  ,"52096=2001-07-06=2001-187=2001-W27-5"
+  ,"52097=2001-07-07=2001-188=2001-W27-6"
+  ,"52098=2001-07-08=2001-189=2001-W27-7"
+  ,"52099=2001-07-09=2001-190=2001-W28-1"
+  ,"52100=2001-07-10=2001-191=2001-W28-2"
+  ,"52101=2001-07-11=2001-192=2001-W28-3"
+  ,"52102=2001-07-12=2001-193=2001-W28-4"
+  ,"52103=2001-07-13=2001-194=2001-W28-5"
+  ,"52104=2001-07-14=2001-195=2001-W28-6"
+  ,"52105=2001-07-15=2001-196=2001-W28-7"
+  ,"52106=2001-07-16=2001-197=2001-W29-1"
+  ,"52107=2001-07-17=2001-198=2001-W29-2"
+  ,"52108=2001-07-18=2001-199=2001-W29-3"
+  ,"52109=2001-07-19=2001-200=2001-W29-4"
+  ,"52110=2001-07-20=2001-201=2001-W29-5"
+  ,"52111=2001-07-21=2001-202=2001-W29-6"
+  ,"52112=2001-07-22=2001-203=2001-W29-7"
+  ,"52113=2001-07-23=2001-204=2001-W30-1"
+  ,"52114=2001-07-24=2001-205=2001-W30-2"
+  ,"52115=2001-07-25=2001-206=2001-W30-3"
+  ,"52116=2001-07-26=2001-207=2001-W30-4"
+  ,"52117=2001-07-27=2001-208=2001-W30-5"
+  ,"52118=2001-07-28=2001-209=2001-W30-6"
+  ,"52119=2001-07-29=2001-210=2001-W30-7"
+  ,"52120=2001-07-30=2001-211=2001-W31-1"
+  ,"52121=2001-07-31=2001-212=2001-W31-2"
+  ,"52122=2001-08-01=2001-213=2001-W31-3"
+  ,"52123=2001-08-02=2001-214=2001-W31-4"
+  ,"52124=2001-08-03=2001-215=2001-W31-5"
+  ,"52125=2001-08-04=2001-216=2001-W31-6"
+  ,"52126=2001-08-05=2001-217=2001-W31-7"
+  ,"52127=2001-08-06=2001-218=2001-W32-1"
+  ,"52128=2001-08-07=2001-219=2001-W32-2"
+  ,"52129=2001-08-08=2001-220=2001-W32-3"
+  ,"52130=2001-08-09=2001-221=2001-W32-4"
+  ,"52131=2001-08-10=2001-222=2001-W32-5"
+  ,"52132=2001-08-11=2001-223=2001-W32-6"
+  ,"52133=2001-08-12=2001-224=2001-W32-7"
+  ,"52134=2001-08-13=2001-225=2001-W33-1"
+  ,"52135=2001-08-14=2001-226=2001-W33-2"
+  ,"52136=2001-08-15=2001-227=2001-W33-3"
+  ,"52137=2001-08-16=2001-228=2001-W33-4"
+  ,"52138=2001-08-17=2001-229=2001-W33-5"
+  ,"52139=2001-08-18=2001-230=2001-W33-6"
+  ,"52140=2001-08-19=2001-231=2001-W33-7"
+  ,"52141=2001-08-20=2001-232=2001-W34-1"
+  ,"52142=2001-08-21=2001-233=2001-W34-2"
+  ,"52143=2001-08-22=2001-234=2001-W34-3"
+  ,"52144=2001-08-23=2001-235=2001-W34-4"
+  ,"52145=2001-08-24=2001-236=2001-W34-5"
+  ,"52146=2001-08-25=2001-237=2001-W34-6"
+  ,"52147=2001-08-26=2001-238=2001-W34-7"
+  ,"52148=2001-08-27=2001-239=2001-W35-1"
+  ,"52149=2001-08-28=2001-240=2001-W35-2"
+  ,"52150=2001-08-29=2001-241=2001-W35-3"
+  ,"52151=2001-08-30=2001-242=2001-W35-4"
+  ,"52152=2001-08-31=2001-243=2001-W35-5"
+  ,"52153=2001-09-01=2001-244=2001-W35-6"
+  ,"52154=2001-09-02=2001-245=2001-W35-7"
+  ,"52155=2001-09-03=2001-246=2001-W36-1"
+  ,"52156=2001-09-04=2001-247=2001-W36-2"
+  ,"52157=2001-09-05=2001-248=2001-W36-3"
+  ,"52158=2001-09-06=2001-249=2001-W36-4"
+  ,"52159=2001-09-07=2001-250=2001-W36-5"
+  ,"52160=2001-09-08=2001-251=2001-W36-6"
+  ,"52161=2001-09-09=2001-252=2001-W36-7"
+  ,"52162=2001-09-10=2001-253=2001-W37-1"
+  ,"52163=2001-09-11=2001-254=2001-W37-2"
+  ,"52164=2001-09-12=2001-255=2001-W37-3"
+  ,"52165=2001-09-13=2001-256=2001-W37-4"
+  ,"52166=2001-09-14=2001-257=2001-W37-5"
+  ,"52167=2001-09-15=2001-258=2001-W37-6"
+  ,"52168=2001-09-16=2001-259=2001-W37-7"
+  ,"52169=2001-09-17=2001-260=2001-W38-1"
+  ,"52170=2001-09-18=2001-261=2001-W38-2"
+  ,"52171=2001-09-19=2001-262=2001-W38-3"
+  ,"52172=2001-09-20=2001-263=2001-W38-4"
+  ,"52173=2001-09-21=2001-264=2001-W38-5"
+  ,"52174=2001-09-22=2001-265=2001-W38-6"
+  ,"52175=2001-09-23=2001-266=2001-W38-7"
+  ,"52176=2001-09-24=2001-267=2001-W39-1"
+  ,"52177=2001-09-25=2001-268=2001-W39-2"
+  ,"52178=2001-09-26=2001-269=2001-W39-3"
+  ,"52179=2001-09-27=2001-270=2001-W39-4"
+  ,"52180=2001-09-28=2001-271=2001-W39-5"
+  ,"52181=2001-09-29=2001-272=2001-W39-6"
+  ,"52182=2001-09-30=2001-273=2001-W39-7"
+  ,"52183=2001-10-01=2001-274=2001-W40-1"
+  ,"52184=2001-10-02=2001-275=2001-W40-2"
+  ,"52185=2001-10-03=2001-276=2001-W40-3"
+  ,"52186=2001-10-04=2001-277=2001-W40-4"
+  ,"52187=2001-10-05=2001-278=2001-W40-5"
+  ,"52188=2001-10-06=2001-279=2001-W40-6"
+  ,"52189=2001-10-07=2001-280=2001-W40-7"
+  ,"52190=2001-10-08=2001-281=2001-W41-1"
+  ,"52191=2001-10-09=2001-282=2001-W41-2"
+  ,"52192=2001-10-10=2001-283=2001-W41-3"
+  ,"52193=2001-10-11=2001-284=2001-W41-4"
+  ,"52194=2001-10-12=2001-285=2001-W41-5"
+  ,"52195=2001-10-13=2001-286=2001-W41-6"
+  ,"52196=2001-10-14=2001-287=2001-W41-7"
+  ,"52197=2001-10-15=2001-288=2001-W42-1"
+  ,"52198=2001-10-16=2001-289=2001-W42-2"
+  ,"52199=2001-10-17=2001-290=2001-W42-3"
+  ,"52200=2001-10-18=2001-291=2001-W42-4"
+  ,"52201=2001-10-19=2001-292=2001-W42-5"
+  ,"52202=2001-10-20=2001-293=2001-W42-6"
+  ,"52203=2001-10-21=2001-294=2001-W42-7"
+  ,"52204=2001-10-22=2001-295=2001-W43-1"
+  ,"52205=2001-10-23=2001-296=2001-W43-2"
+  ,"52206=2001-10-24=2001-297=2001-W43-3"
+  ,"52207=2001-10-25=2001-298=2001-W43-4"
+  ,"52208=2001-10-26=2001-299=2001-W43-5"
+  ,"52209=2001-10-27=2001-300=2001-W43-6"
+  ,"52210=2001-10-28=2001-301=2001-W43-7"
+  ,"52211=2001-10-29=2001-302=2001-W44-1"
+  ,"52212=2001-10-30=2001-303=2001-W44-2"
+  ,"52213=2001-10-31=2001-304=2001-W44-3"
+  ,"52214=2001-11-01=2001-305=2001-W44-4"
+  ,"52215=2001-11-02=2001-306=2001-W44-5"
+  ,"52216=2001-11-03=2001-307=2001-W44-6"
+  ,"52217=2001-11-04=2001-308=2001-W44-7"
+  ,"52218=2001-11-05=2001-309=2001-W45-1"
+  ,"52219=2001-11-06=2001-310=2001-W45-2"
+  ,"52220=2001-11-07=2001-311=2001-W45-3"
+  ,"52221=2001-11-08=2001-312=2001-W45-4"
+  ,"52222=2001-11-09=2001-313=2001-W45-5"
+  ,"52223=2001-11-10=2001-314=2001-W45-6"
+  ,"52224=2001-11-11=2001-315=2001-W45-7"
+  ,"52225=2001-11-12=2001-316=2001-W46-1"
+  ,"52226=2001-11-13=2001-317=2001-W46-2"
+  ,"52227=2001-11-14=2001-318=2001-W46-3"
+  ,"52228=2001-11-15=2001-319=2001-W46-4"
+  ,"52229=2001-11-16=2001-320=2001-W46-5"
+  ,"52230=2001-11-17=2001-321=2001-W46-6"
+  ,"52231=2001-11-18=2001-322=2001-W46-7"
+  ,"52232=2001-11-19=2001-323=2001-W47-1"
+  ,"52233=2001-11-20=2001-324=2001-W47-2"
+  ,"52234=2001-11-21=2001-325=2001-W47-3"
+  ,"52235=2001-11-22=2001-326=2001-W47-4"
+  ,"52236=2001-11-23=2001-327=2001-W47-5"
+  ,"52237=2001-11-24=2001-328=2001-W47-6"
+  ,"52238=2001-11-25=2001-329=2001-W47-7"
+  ,"52239=2001-11-26=2001-330=2001-W48-1"
+  ,"52240=2001-11-27=2001-331=2001-W48-2"
+  ,"52241=2001-11-28=2001-332=2001-W48-3"
+  ,"52242=2001-11-29=2001-333=2001-W48-4"
+  ,"52243=2001-11-30=2001-334=2001-W48-5"
+  ,"52244=2001-12-01=2001-335=2001-W48-6"
+  ,"52245=2001-12-02=2001-336=2001-W48-7"
+  ,"52246=2001-12-03=2001-337=2001-W49-1"
+  ,"52247=2001-12-04=2001-338=2001-W49-2"
+  ,"52248=2001-12-05=2001-339=2001-W49-3"
+  ,"52249=2001-12-06=2001-340=2001-W49-4"
+  ,"52250=2001-12-07=2001-341=2001-W49-5"
+  ,"52251=2001-12-08=2001-342=2001-W49-6"
+  ,"52252=2001-12-09=2001-343=2001-W49-7"
+  ,"52253=2001-12-10=2001-344=2001-W50-1"
+  ,"52254=2001-12-11=2001-345=2001-W50-2"
+  ,"52255=2001-12-12=2001-346=2001-W50-3"
+  ,"52256=2001-12-13=2001-347=2001-W50-4"
+  ,"52257=2001-12-14=2001-348=2001-W50-5"
+  ,"52258=2001-12-15=2001-349=2001-W50-6"
+  ,"52259=2001-12-16=2001-350=2001-W50-7"
+  ,"52260=2001-12-17=2001-351=2001-W51-1"
+  ,"52261=2001-12-18=2001-352=2001-W51-2"
+  ,"52262=2001-12-19=2001-353=2001-W51-3"
+  ,"52263=2001-12-20=2001-354=2001-W51-4"
+  ,"52264=2001-12-21=2001-355=2001-W51-5"
+  ,"52265=2001-12-22=2001-356=2001-W51-6"
+  ,"52266=2001-12-23=2001-357=2001-W51-7"
+  ,"52267=2001-12-24=2001-358=2001-W52-1"
+  ,"52268=2001-12-25=2001-359=2001-W52-2"
+  ,"52269=2001-12-26=2001-360=2001-W52-3"
+  ,"52270=2001-12-27=2001-361=2001-W52-4"
+  ,"52271=2001-12-28=2001-362=2001-W52-5"
+  ,"52272=2001-12-29=2001-363=2001-W52-6"
+  ,"52273=2001-12-30=2001-364=2001-W52-7"
+  ,"52274=2001-12-31=2001-365=2002-W01-1"
+  ,"52275=2002-01-01=2002-001=2002-W01-2"
+  ,"52276=2002-01-02=2002-002=2002-W01-3"
+  ,"52277=2002-01-03=2002-003=2002-W01-4"
+  ,"52278=2002-01-04=2002-004=2002-W01-5"
+  ,"52279=2002-01-05=2002-005=2002-W01-6"
+  ,"52280=2002-01-06=2002-006=2002-W01-7"
+  ,""
+  ,"51178=1998-12-31=1998-365=1998-W53-4"
+  ,""
+  ,"1998-12-31 23:59:60.5"
+  ,"51178,86400.5s"
+  ,"1998-12-31 15:59:60.5"
+  ,"51178,86400.5s"
+  ,""
+  ,"2000-03-01 00:00:00"
+  ,"2000-03-01 12:00:00"
+  ,"2000-02-29 16:00:00"
+  ,"2000-03-01 04:00:00"
+  ,"2000-03-01 08:00:00"
+  ,"2000-03-01 20:00:00"
+  ,""
+  ,"12:34:56.789"
+  ,"12:34:56.789123"
+  ,"12:34:56.789123456"
+  ,"12:34:56.789123456789"
+  -- ,if is64Bit then "-9223372036854775808:00:00" else "-2147483648:00:00"
+  ,"" ]
diff --git a/test/main/Test/TestUtil.hs b/test/main/Test/TestUtil.hs
new file mode 100644
--- /dev/null
+++ b/test/main/Test/TestUtil.hs
@@ -0,0 +1,36 @@
+module Test.TestUtil where
+
+import Test.QuickCheck.Property
+import Test.Tasty
+import Test.Tasty.HUnit
+import Test.Tasty.QuickCheck
+
+assertFailure' :: String -> IO a
+assertFailure' s = do
+    _ <- assertFailure s -- returns () in some versions
+    return undefined
+
+assertJust :: Maybe a -> IO a
+assertJust (Just a) = return a
+assertJust Nothing = assertFailure' "Nothing"
+
+class NameTest a where
+    nameTest :: String -> a -> TestTree
+
+instance NameTest [TestTree] where
+    nameTest = testGroup
+
+instance NameTest Assertion where
+    nameTest = Test.Tasty.HUnit.testCase
+
+instance NameTest Property where
+    nameTest = testProperty
+
+instance NameTest Result where
+    nameTest name = nameTest name . property
+
+instance (Arbitrary a,Show a,Testable b) => NameTest (a -> b) where
+    nameTest name = nameTest name . property
+
+tgroup :: (Show a,NameTest t) => [a] -> (a -> t) -> [TestTree]
+tgroup aa f = fmap (\a -> nameTest (show a) $ f a) aa
diff --git a/time-compat.cabal b/time-compat.cabal
--- a/time-compat.cabal
+++ b/time-compat.cabal
@@ -1,36 +1,32 @@
-cabal-version: 2.2
+cabal-version: 1.12
 name:          time-compat
-version:       1.9.2
-tested-with:   GHC ==7.8.4 || ==7.6.3 || ==7.4.2
+version:       1.9.2.1
 synopsis:      Compatibility package for time
 description:
   This packages tries to compat as much of @time@ features as possible.
   .
-  /TODO:/ Difference type @ParseTime@ and @FormatTime@ instances are missing.
+  /TODO:/
+  .
+  * Difference type @ParseTime@ and @FormatTime@ instances are missing.
+  .
+  * Formatting varies depending on underlying @time@ version
+  .
+  * @dayFractionToTimeOfDay@ on extreme values
 
 category:      Time, Compatibility
-license:       BSD-3-Clause
+license:       BSD3
 license-file:  LICENSE
 maintainer:    Oleg Grenrus <oleg.grenrus@iki.fi>
 author:        Ashley Yakeley
-
+homepage:      https://github.com/phadej/time-compat
+bug-reports:   https://github.com/phadej/time-compat/issues
+build-type:    Simple
 tested-with:
-  GHC==7.0.4
-  GHC==7.2.2,
-  GHC==7.4.2,
-  GHC==7.6.3,
-  GHC==7.8.4,
-  GHC==7.10.3,
-  GHC==8.0.2,
-  GHC==8.2.2,
-  GHC==8.4.4,
-  GHC==8.6.5,
-  GHC==8.8.1
+  GHC ==8.8.1 || ==8.6.5 || ==8.4.4 || ==8.2.2 || ==8.0.2 || ==7.10.3 || ==7.8.4 || ==7.6.3 || ==7.4.2 || ==7.2.2 || ==7.0.4
 
 source-repository head
-  type:      git
-  location:  https://github.com/phadej/time-compat.git
-
+  type:     git
+  location: https://github.com/phadej/time-compat.git
 
 flag old-locale
   description: If true, use old-locale, otherwise use time 1.5 or newer.
@@ -46,14 +42,14 @@
     default-extensions: Trustworthy
 
   build-depends:
-    , base          >=4.3     && <4.14
-    , base-orphans  ^>=0.8.1
-    , deepseq       ^>=1.3.0.0 || ^>=1.4.1.1
-    , time          ^>=1.2.0.3 || ^>=1.4 || ^>=1.5.0.1 || ^>=1.6.0.1 || ^>=1.8.0.2 || ^>=1.9.2
+      base          >=4.3     && <4.14
+    , base-orphans  >=0.8.1   && <0.9
+    , deepseq       >=1.3.0.0 && <1.4 || >=1.4.1.1 && <1.5
+    , time          >=1.2     && <1.3 || >=1.4 && <1.7 || >=1.8 && <1.10
 
   if flag(old-locale)
     build-depends:
-      , old-locale  ^>=1.0.0.2
+        old-locale  >=1.0.0.2 && <1.1
       , time        >=0       && <1.5
 
   else
@@ -61,7 +57,7 @@
 
   if !impl(ghc >=8.0)
     build-depends:
-      , fail        ^>=4.9.0.0
+        fail        >=4.9.0.0 && <4.10
       , semigroups  >=0.18.5  && <0.20
 
   exposed-modules:
@@ -91,7 +87,71 @@
   hs-source-dirs:   test
   main-is:          Test.hs
   build-depends:
-    , base
+      base
     , deepseq
+    , HUnit        >=1.3.1 && <1.3.2 || >=1.6.0.0 && <1.7
     , time-compat
-    , HUnit ^>=1.6.0.0 || ^>=1.3.1.2
+
+-- This test-suite is from test library
+test-suite main
+  if !impl(ghc >=7.4)
+    buildable: False
+
+  default-language:   Haskell2010
+  type:               exitcode-stdio-1.0
+  hs-source-dirs:     test/main
+  default-extensions:
+    CPP
+    DeriveDataTypeable
+    ExistentialQuantification
+    FlexibleInstances
+    MultiParamTypeClasses
+    Rank2Types
+    ScopedTypeVariables
+    StandaloneDeriving
+    TupleSections
+    UndecidableInstances
+
+  ghc-options:        -Wall -fwarn-tabs
+  build-depends:
+      base
+    , base-compat       >=0.10.5 && <0.11
+    , deepseq
+    , QuickCheck        >=2.13   && <2.14
+    , tagged            >=0.8.6  && <0.9
+    , tasty             >=1.2.1  && <1.3
+    , tasty-hunit       >=0.10   && <0.11
+    , tasty-quickcheck  >=0.10   && <0.11
+    , time-compat
+
+  build-depends:      time
+  main-is:            Main.hs
+  other-modules:
+    Test.Arbitrary
+    Test.Calendar.AddDays
+    Test.Calendar.AddDaysRef
+    Test.Calendar.Calendars
+    Test.Calendar.CalendarsRef
+    Test.Calendar.ClipDates
+    Test.Calendar.ClipDatesRef
+    Test.Calendar.ConvertBack
+    Test.Calendar.Duration
+    Test.Calendar.Easter
+    Test.Calendar.EasterRef
+    Test.Calendar.LongWeekYears
+    Test.Calendar.LongWeekYearsRef
+    Test.Calendar.MonthDay
+    Test.Calendar.MonthDayRef
+    Test.Calendar.Valid
+    Test.Calendar.Week
+    Test.Clock.Conversion
+    Test.Clock.Resolution
+    Test.Clock.TAI
+    Test.Format.Format
+    Test.Format.ISO8601
+    Test.Format.ParseTime
+    Test.LocalTime.CalendarDiffTime
+    Test.LocalTime.Time
+    Test.LocalTime.TimeOfDay
+    Test.LocalTime.TimeRef
+    Test.TestUtil
