UTCTime package:time

This is the simplest representation of UTC. It consists of the day number, and a time offset from midnight. Note that if a day has a leap second added to it, it will have 86401 seconds.

UTCTime :: Day -> DiffTime -> UTCTime

time Data.Time.Clock

utcTimeToPOSIXSeconds :: UTCTime -> POSIXTime

time Data.Time.Clock.POSIX

utcTimeFormat :: Format Day -> Format TimeOfDay -> Format UTCTime

time Data.Time.Format.ISO8601

xTyZ [ISO 8601:2004(E) sec. 4.3.2]

addUTCTime :: NominalDiffTime -> UTCTime -> UTCTime

time Data.Time.Clock

addUTCTime a b = a + b

diffUTCTime :: UTCTime -> UTCTime -> NominalDiffTime

time Data.Time.Clock

diffUTCTime a b = a - b

posixSecondsToUTCTime :: POSIXTime -> UTCTime

time Data.Time.Clock.POSIX

systemToUTCTime :: SystemTime -> UTCTime

time Data.Time.Clock.System

Convert SystemTime to UTCTime, matching zero SystemTime to midnight of systemEpochDay UTC.

taiToUTCTime :: LeapSecondMap -> AbsoluteTime -> Maybe UTCTime

time Data.Time.Clock.TAI

localToUTCTimeOfDay :: TimeZone -> TimeOfDay -> (Integer, TimeOfDay)

time Data.Time.LocalTime

Convert a time of day in some timezone to a time of day in UTC, together with a day adjustment.