diff --git a/ChangeLog.md b/ChangeLog.md
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--- /dev/null
+++ b/ChangeLog.md
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+# Changelog for vformat-time
+
+## Unreleased changes
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+Copyright (c) 2020 Version Cloud
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Jorah Gao nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+# vformat-time
+
+Please see http://hackage.haskell.org/package/vformat-time
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/src/Text/Format/Time.hs b/src/Text/Format/Time.hs
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+++ b/src/Text/Format/Time.hs
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+{-| This module extend vformat to 'FormatTime' datatypes
+
+The specs of 'FormatTime' is same as the second argument of
+"Data.Time.Format.formatTime".
+
+=== Examples
+
+>>> utc <- getCurrentTime
+>>> zoned <- getZonedTime
+>>> let locale = utcToLocalTime (zonedTimeZone zoned) utc
+>>> format "{} / {} / {}" utc zoned locale
+"2020-01-21 05:54:41.137832 / 2020-01-21 13:54:45.310354 CST / 2020-01-21 13:54:41.137832"
+>>> format "{:%Y-%m-%dT%H:%M:%S}" utc
+"2020-01-21T05:54:41"
+-}
+module Text.Format.Time
+  ( formatTimeLocale
+  , formatTime
+    ) where
+
+import           Data.Time.Calendar
+import           Data.Time.Clock
+import           Data.Time.Format    hiding (formatTime)
+import qualified Data.Time.Format    as T
+import           Data.Time.LocalTime
+import           Text.Format
+
+
+-- | Default specs is @%F@
+instance FormatArg Day where
+  formatArg = defaultSpecs "%F" formatTime
+
+-- | Default specs is @%F %T%Q@
+instance FormatArg UTCTime where
+  formatArg = formatTime
+
+-- | Default specs is @%F %T%Q@
+instance FormatArg UniversalTime where
+  formatArg = formatTime
+
+-- | Default specs is @%Z@
+instance FormatArg TimeZone where
+  formatArg = defaultSpecs "%Z" formatTime
+
+-- | Default specs is @%T@
+instance FormatArg TimeOfDay where
+  formatArg = defaultSpecs "%T" formatTime
+
+-- | Default specs is @%F %T%Q@
+instance FormatArg LocalTime where
+  formatArg = formatTime
+
+-- | Default specs is @%F %T%Q %Z@
+instance FormatArg ZonedTime where
+  formatArg = defaultSpecs "%F %T%Q %Z" formatTime
+
+
+{-| Formatter for 'FormatTime' values using a specific 'TimeLocale'. -}
+formatTimeLocale :: FormatTime t => TimeLocale -> t -> Formatter
+formatTimeLocale locale = defaultSpecs "%F %T%Q" $ \x k fmt ->
+  formatString (T.formatTime locale (fmtSpecs fmt) x) k (fmt{fmtSpecs=""})
+
+
+{-| Formatter for 'FormatTime' values using the 'defaultTimeLocale'. -}
+formatTime :: FormatTime t => t -> Formatter
+formatTime = formatTimeLocale defaultTimeLocale
diff --git a/test/Main.hs b/test/Main.hs
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--- /dev/null
+++ b/test/Main.hs
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+{-# LANGUAGE OverloadedStrings #-}
+
+module Main ( main ) where
+
+import           Control.Exception
+
+import           Data.Time.Calendar
+import           Data.Time.Clock
+import           Data.Time.Format
+import           Data.Time.LocalTime
+import           Text.Format
+import           Text.Format.Time    hiding (formatTime)
+
+main :: IO ()
+main = do
+  utc <- getCurrentTime
+  zoned <- getZonedTime
+  let tz = zonedTimeZone zoned
+      locale = utcToLocalTime tz utc
+      universal = read (show locale) :: UniversalTime
+      day = localDay locale
+      time = localTimeOfDay locale
+
+  putStrLn "\n<<<<<<<<<<<<<<<<<<<<<< Test <<<<<<<<<<<<<<<<<<<<<<"
+
+  it "UTCTime default specs" $
+    format "{}" utc == formatTimeDef "%F %T%Q" utc
+  it "ZonedTime default specs" $
+    format "{}" zoned == formatTimeDef "%F %T%Q %Z" zoned
+  it "LocalTime default specs" $
+    format "{}" locale == formatTimeDef "%F %T%Q" locale
+  it "UniversalTime default specs" $
+    format "{}" universal == formatTimeDef "%F %T%Q" universal
+  it "Day default specs" $
+    format "{}" day == formatTimeDef "%F" day
+  it "TimeZone default specs" $
+    format "{}" tz == formatTimeDef "%Z" tz
+  it "Customize specs" $
+    format "{:%Y-%m-%d}" utc == formatTimeDef "%Y-%m-%d" utc
+
+  putStrLn "\n>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
+
+
+it :: String -> Bool -> IO ()
+it = flip assert . putStrLn
+
+
+formatTimeDef :: FormatTime t => String -> t -> String
+formatTimeDef = formatTime defaultTimeLocale
diff --git a/vformat-time.cabal b/vformat-time.cabal
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--- /dev/null
+++ b/vformat-time.cabal
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+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.31.1.
+--
+-- see: https://github.com/sol/hpack
+--
+-- hash: 6b8cc46edeff772798f6c1f42bf0f2d5b6365fb37b939d2bebe7c5b9c3233b38
+
+name:           vformat-time
+version:        0.1.0.0
+synopsis:       Extend vformat to time datatypes
+description:    Please see http://hackage.haskell.org/package/vformat-time
+category:       Text, Format, Time
+homepage:       https://github.com/versioncloud/vformat-time#readme
+bug-reports:    https://github.com/versioncloud/vformat-time/issues
+author:         Jorah Gao
+maintainer:     jorah@version.cloud
+copyright:      Copyright (c) 2020 Version Cloud
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    ChangeLog.md
+
+source-repository head
+  type: git
+  location: https://github.com/versioncloud/vformat-time
+
+library
+  exposed-modules:
+      Text.Format.Time
+  other-modules:
+      Paths_vformat_time
+  hs-source-dirs:
+      src
+  build-depends:
+      base >=4.7 && <5
+    , time >=1.4 && <2.0
+    , vformat >=0.12 && <1.0
+  default-language: Haskell2010
+
+test-suite vformat-time-test
+  type: exitcode-stdio-1.0
+  main-is: Main.hs
+  other-modules:
+      Paths_vformat_time
+  hs-source-dirs:
+      test
+  ghc-options: -threaded -rtsopts -with-rtsopts=-N -O0
+  build-depends:
+      base >=4.7 && <5
+    , time >=1.4 && <2.0
+    , vformat >=0.12 && <1.0
+    , vformat-time
+  default-language: Haskell2010