24:00:00 Guide

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

Used to mark the exact conclusion of the current day. It is the only time where the hour "24" is permitted, and it must be followed by "00" for minutes and seconds. 2. Common Use Cases 24:00:00

The "24:00:00" format is most frequently found in environments where a day's end must be clearly defined: Used to mark the very start of a new calendar day

Agreements often state they are valid from the start date at 00:00 until the end date at 24:00 to ensure there is no gap in coverage. 24:00:00

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