aeson-test.cabal

name:                aeson-test
version:             0.1
license:             AllRightsReserved
build-type:          Simple
cabal-version:       >=1.8

executable install-test
  hs-source-dirs:    .
  main-is:           AesonTest.hs
  build-depends:     base >= 4.5 && < 5
                   , aeson >= 0.7.0.3
                   , time

AesonTest.hs

{-# LANGUAGE ScopedTypeVariables, OverloadedStrings #-}
import Data.Aeson
import Data.Time (UTCTime)

main = do
  let Just (t :: [UTCTime]) = decode' "[\"2014-04-28T05:05:05.000Z\"]"
  print t
  let Just (t :: [UTCTime]) = decode' "[\"2014-04-28T05:05:05Z\"]"
  print t
  -- The below examples do not parse with aeson 0.7.0.3
  -- Format used by Python 2.7's datetime.__str__()
  print $ (read "2014-04-28 15:20:28.391413" :: UTCTime)
  print $ (read "2014-04-28 15:20:28" :: UTCTime)
  let Just (t :: [UTCTime]) = decode' "[\"2014-04-28 15:20:28.391413\"]"
  print t
  let Just (t :: [UTCTime]) = decode' "[\"2014-04-28 15:20:28\"]"
  print t

test.py

from datetime import datetime

d = datetime.now()
print datetime.now()
print datetime.now().__str__()