Creates a DateTime corresponding to the given Unix time t
Unix time is the number of seconds that have elapsed since 1970-01-01
00:00:00 UTC, regardless of the local time offset.
This call can fail (ConstructionException) if t represents a time outside
of the supported range of GDateTime.
You should release the return value by calling unref()
when you are done with it
Creates a DateTime corresponding to the given Unix time t Unix time is the number of seconds that have elapsed since 1970-01-01 00:00:00 UTC, regardless of the local time offset.
This call can fail (ConstructionException) if t represents a time outside of the supported range of GDateTime. You should release the return value by calling unref() when you are done with it