DTM Date/Time Reference
To specify pertinent dates and times
Code specifying type of date or time, or both date and time.
At least one of DTM02 or DTM03 must be present.
Time expressed in 24-hour clock time (HHMM, time range: 0000 though 2359).
Code identifying the time. In accordance with International Standards Organization standard 8601, time can be specified by a + or - and an indication in hours in relation to Universal Time Coordinate (UTC) time. Since + is a restricted character, + and - are substituted by P and M in the codes that follow.