POSIXTime -package:tztime package:thyme

The nominal (ignoring leap seconds) time difference since midnight 1970-01-01, the Unix epoch. Equvialent to a normalised struct timeval.
Control.Lens.Iso between UTCTime and POSIXTime.
> getPOSIXTime
1459515013.527711s
> review posixTime <$> getPOSIXTime
2016-01-01 12:50:45.588729 UTC
Return the current system POSIX time via gettimeofday, or getSystemTimeAsFileTime on Windows. See also getCurrentTime, getZonedTime.