24:00:00 Official

Shift schedules use 00:00 for shifts starting at midnight and 24:00 for shifts ending at midnight. 3. Conversion Guide

A store open "00:00–24:00" is open for the full 24-hour cycle. 24:00:00

If you are converting between the 24-hour and 12-hour clock, use this quick reference: 24-Hour Format 12-Hour (AM/PM) Equivalent 12:00:00 AM Start of the day 12:00:00 12:00:00 PM Midday / Noon 23:59:59 11:59:59 PM Last second of the day 24:00:00 12:00:00 AM End of the day (transition point) 4. Modern Standards & Limitations Shift schedules use 00:00 for shifts starting at

While they represent the same physical moment, the choice of notation depends on the perspective of the time interval: If you are converting between the 24-hour and

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

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 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