diff --git a/date-conversions.cabal b/date-conversions.cabal
--- a/date-conversions.cabal
+++ b/date-conversions.cabal
@@ -1,5 +1,5 @@
 name:                date-conversions
-version:             0.1.0.0
+version:             0.2.0.0
 synopsis:            Date conversions
 description:         Please see README.md
 homepage:            https://github.com/thoughtbot/date-conversions#readme
diff --git a/src/Data/Time/Calendar/DateConversions.hs b/src/Data/Time/Calendar/DateConversions.hs
--- a/src/Data/Time/Calendar/DateConversions.hs
+++ b/src/Data/Time/Calendar/DateConversions.hs
@@ -11,6 +11,18 @@
     , endOfMonth
     , endOfQuarter
     , endOfYear
+
+    -- next
+    , nextWeek
+    , nextMonth
+    , nextQuarter
+    , nextYear
+
+    -- previous
+    , previousWeek
+    , previousMonth
+    , previousQuarter
+    , previousYear
     ) where
 
 import qualified Data.Dates as D
@@ -51,3 +63,27 @@
 
 endOfYear :: T.Day -> T.Day
 endOfYear = T.addDays (-1) . T.addGregorianYearsClip 1 . beginningOfYear
+
+nextWeek :: T.Day -> T.Day
+nextWeek = T.addDays 7 . beginningOfWeek
+
+nextMonth :: T.Day -> T.Day
+nextMonth = T.addGregorianMonthsClip 1 . beginningOfMonth
+
+nextQuarter :: T.Day -> T.Day
+nextQuarter = T.addGregorianMonthsClip 3 . beginningOfQuarter
+
+nextYear :: T.Day -> T.Day
+nextYear = T.addGregorianMonthsClip 12 . beginningOfYear
+
+previousWeek :: T.Day -> T.Day
+previousWeek = T.addDays (-7) . beginningOfWeek
+
+previousMonth :: T.Day -> T.Day
+previousMonth = T.addGregorianMonthsClip (-1) . beginningOfMonth
+
+previousQuarter :: T.Day -> T.Day
+previousQuarter = T.addGregorianMonthsClip (-3) . beginningOfQuarter
+
+previousYear :: T.Day -> T.Day
+previousYear = T.addGregorianMonthsClip (-12) . beginningOfYear