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This template converts a time from 24-hour to 12-hour format. It accepts one optional unnamed parameter. If the parameter is absent or neither a valid time nor number, the template returns the UTC at the time the page was generated.
In the 24-hour time notation, the day begins at midnight, 00:00 or 0:00, and the last minute of the day begins at 23:59. Where convenient, the notation 24:00 may also be used to refer to midnight at the end of a given date [3] — that is, 24:00 of one day is the same time as 00:00 of the following day.
Decimal time was used in China throughout most of its history alongside duodecimal time. The midnight-to-midnight day was divided both into 12 double hours (traditional Chinese: 時辰; simplified Chinese: 时辰; pinyin: shí chén) and also into 10 shi / 100 ke (Chinese: 刻; pinyin: kè) by the 1st millennium BC.
[12] Date Time Group format, used most often in operation orders. This format uses DDHHMMZMONYY, with DD being the two-digit day, HHMM being the time on a 24-hour clock, Z being the timezone code, MON being the three-letter month, and YY being the two-digit year. For example, 041200ZFEB23 is noon, UTC, on 4 Feb 2023. [13]
The 24-hour clock is the most commonly used method worldwide to physically represent the time of day. Some regions utilize 24-hour time notation in casual speech as well, such as regions that speak German, French, or Romanian, though this is less common overall; other countries that utilize the 24-hour clock for displaying time physically may ...
The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translating to "before midday") and p.m. (from Latin post meridiem, translating to "after midday").
The amount of time light takes to travel one Planck length. quectosecond: 10 −30 s: One nonillionth of a second. rontosecond: 10 −27 s: One octillionth of a second. yoctosecond: 10 −24 s: One septillionth of a second. jiffy (physics) 3 × 10 −24 s: The amount of time light takes to travel one fermi (about the size of a nucleon) in a ...
Hexadecimal time is the representation of the time of day as a hexadecimal number in the interval [0, 1). The day is divided into 10 16 (16 10 ) hexadecimal hours, each hour into 100 16 (256 10 ) hexadecimal minutes, and each minute into 10 16 (16 10 ) hexadecimal seconds.