| 24-hour clock | 12-hour clock |
|---|---|
| 00:00 | 12:00 AM Midnight |
| 01:00 | 1:00 AM |
| 02:00 | 2:00 AM |
| 03:00 | 3:00 AM |
| 04:00 | 4:00 AM |
| 05:00 | 5:00 AM |
| 06:00 | 6:00 AM |
| 07:00 | 7:00 AM |
| 08:00 | 8:00 AM |
| 09:00 | 9:00 AM |
| 10:00 | 10:00 AM |
| 11:00 | 11:00 AM |
| 12:00 | 12:00 PM Midday Noon |
| 13:00 | 1:00 PM |
| 14:00 | 2:00 PM |
| 15:00 | 3:00 PM |
| 16:00 | 4:00 PM |
| 17:00 | 5:00 PM |
| 18:00 | 6:00 PM |
| 19:00 | 7:00 PM |
| 20:00 | 8:00 PM |
| 21:00 | 9:00 PM |
| 22:00 | 10:00 PM |
| 23:00 | 11:00 PM |
The 24-hour clock is a method of telling the time in which the civil day runs from midnight until next midnight.
The following numbers (used once in the same civil day) of hours are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 and 23, without AM nor PM.
This system is also referred to (only in the United States and the English speaking parts of Canada) as military time[1][better source needed] or (only in the United Kingdom and now very rarely) as continental time. [source?]
In some parts of the world, it is called railway time. Also, the international standard notation of time (ISO 8601) is based on this format.[source?]
Particulars
changeA time in the 24-hour clock is written in the form hours:minutes (for example, 01:23), or hours:minutes:seconds (01:23:45). Numbers under 10 have a zero in front (called a leading zero); e.g. 09:07. Under the 24-hour clock system, the day begins at midnight, 00:00. The last minute of the day begins at 23:59 and ends at 24:00, which is the same as 00:00 of the following day. This means that "Tuesday at 24:00" and "Wednesday at 00:00" are the same time.[source?] Because of this, 12:00 is always noon.
Advantages over the 12-hour clock system:[source?]
- Less confusion between morning and evening.
- 12:00 is always midday.
Application
changeRegional
changeMilitary
changeThe U.S. military prefers not to say 24:00 - they do not like to have two names for the same thing, so they always say "23:59", which is one minute before midnight.[source?]
24-hour clock time is used in computers, by the militaries, for public safety, and in transport.[source?]
Railway
changeIn railway timetables 24:00 means the end of the day. For example, a train due to arrive at a station during the last minute of a day arrives at 24:00; but trains which depart during the first minute of the day go at 24:00. To write shop opening hours until midnight use, for example, "24:00–24:00", "07:00–24:00".[source?]
Related pages
changeReferences
change- ↑ "How To Convert Military Time". lcym.org. Retrieved 2021-05-07.