DateTime

Tags specified as type DateTime accept a fully formatted date/time/time zone string. For example, “1996-10-05T13:22:00.124-5:00” represents October 5, 1996, at 1:22 and 124 milliseconds p.m., in Eastern Standard Time. This is the same as 6:22 p.m. Coordinated Universal Time (UTC).

Several portions of a DateTime element are optional. The following table describes the optional components and the meaning if they are absent.

Component	Meaning If Absent
±HH:mm (time zone offset)	+00:00 (UTC)
THH:mm:ss.ffffff±HH:mm (time component)	T00:00:00+00:00 (midnight, UTC)
:ss.ffffff (seconds and fractional seconds)	:00.000000 (zero seconds)
.ffffff (fractional seconds)	.000000 (zero fractional seconds)

Note: Time zones are specified by an offset, which defines the time zone. Valid offset values are in the range from -12:59 to +12:59, and the sign is required.