A date-time value uses these formats:
Format details:
The time zone designator is optional. If missing, the time zone is unknown.
Prefer local time-zone designators (+hh:mm or -hh:mm) over converting to UTC.
Example:
2004-10-23T12:00:00-06:00 is more informative than 2004-10-23T18:00:00Z.
For more details, see the official documentation: XMP Data Types .