Bus or train timetables may show 00:00 as a departure time (starting the day) and 24:00 as an arrival time (ending the day).
While they represent the same physical moment, the choice of notation depends on the perspective of the time interval:
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.
The "24:00:00" format is most frequently found in environments where a day's end must be clearly defined:
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.
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
Shift schedules use 00:00 for shifts starting at midnight and 24:00 for shifts ending at midnight. 3. Conversion Guide
