A combined date and time of day item specifies the time on a specific day of the year. This type is needed for formats that cannot be represented by individual calendar date (see Calendar date items) and time of day (see Time of day items) items due to ambiguity.
# ISO 8601 extended date and time of day format
1972-09-24T20:02:00,000000-0500
The iso 8601 extended date and time of day format is an iso 8601 date, a ‘T’ character separator, followed by an iso 8601 time of day.