12-hour clock
The 12-hour clock is a method of telling the time in which the civil day runs from midnight until next midnight.
- AM (ante meridiem) = midnight to midday.
- PM (post meridiem) = midday to midnight.
The following numbers (used twice in the same civil day) of hours are: 12 (acting as 0), 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11, with AM or PM.
Both names are from Latin and Latin: ante meridiem, means "before midday" and Latin: post meridiem means "after midday".[1]
The 12-hour time is common in several English-speaking countries and former British colonies (such as the United Kingdom, the United States of America, the English speaking parts of Canada or India), as well as a few other countries. There is no widely accepted convention for how midday and midnight should be represented: in English-speaking countries, "12:00 PM" means 12 o'clock midday, while "12:00 AM" means 12 o'clock midnight.[2][3][4]
| 24-hour clock | 12-hour clock | Period |
|---|---|---|
| 00:00 | 12:00 AM Midnight |
Postmidnight |
| 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 | Morning |
| 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 |
Afternoon |
| 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 | Evening |
| 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 |
12-hour Clock Media
Exeter Cathedral Astronomical Clock, showing the double-XII numbering scheme
World War II RAF sector clock that can be read either in 12- or 24-hour notation
References
- ↑ Time 28 (1986). p. 660 2a.
Time. Retrieved 20 November 2013. - ↑ Is noon 12 am or 12 pm? (in en). Royal Museums Greenwich. Retrieved 2023-01-26.
- ↑ U.S. Government Printing Office Style Manual - Chapter 12 - Numerals. govinfo.gov. Retrieved 2023-01-27.
- ↑ time of day, elapsed time. Resources of the Language Portal of Canada (2020-10-22). Retrieved 2023-01-27.