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

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.

Many programming languages and digital devices do not allow "24:00:00" as a valid input, automatically defaulting it to "00:00:00" of the next day.

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

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

Many programming languages and digital devices do not allow "24:00:00" as a valid input, automatically defaulting it to "00:00:00" of the next day. If you are converting between the 24-hour and

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

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