Checklist

An amendment was published in October 2022, featuring minor technical clarifications and attempts to remove ambiguities in definitions. The most significant change, however, was the reintroduction of the "24:00:00" format to refer to the instant at the end of a calendar day.

with 24:00:
"Time has wrong format. Use one of these formats instead: hh:mm[:ss[.uuuuuu]].