Message creation date/time

The date on which the message is sent. Optionally, the time may be added, using the 24-hour clock, with an explicit indication of the time zone if required, in a format based on ISO 8601. Mandatory and non-repeating.

Format
Permitted formats, where ‘T’ and ‘Z’ represent themselves (ie the letters T and Z), and where the symbol ‘±’ represents either ‘+’ or ‘-’ to indicate a timezone offset from UTC.
YYYYMMDDDate only
YYYYMMDDThhmmDate and time (local time of sender)
YYYYMMDDThhmmZUniversal time (UTC) †
YYYYMMDDThhmm±hhmmWith time zone offset from UTC †
YYYYMMDDThhmmssDate and time (with seconds)
YYYYMMDDThhmmssZUniversal time (with seconds)
YYYYMMDDThhmmss±hhmmWith time zone offset from UTC (with seconds)
† indicates the preferred formats
ReferenceName<SentDateTime>
ShortTag<x307>
Cardinality1
Example20100522T1230Z