24:00:00 May 2026

Used to mark the very start of a new calendar day.

While they represent the same physical moment, the choice of notation depends on the perspective of the time interval: 24:00:00

The most recent international standard for time representation has officially disallowed the use of "24" as an hour, favoring "00:00" to represent the beginning of the day. Used to mark the very start of a new calendar day

The notation refers specifically to midnight at the end of a day in the 24-hour clock system. It is technically identical to 00:00:00 of the following day, but the two formats are used differently to provide clarity in scheduling and legal contexts. 1. Understanding 24:00:00 vs. 00:00:00 24:00:00