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  2. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    The American Heritage Dictionary of the English Language states "By convention, 12 AM denotes midnight and 12 PM denotes noon. Because of the potential for confusion, it is advisable to use 12 noon and 12 midnight". [34] E. G. Richards in his book Mapping Time (1999) provided a diagram in which 12 a.m. means noon and 12 p.m. means midnight. [35]

  3. Midnight - Wikipedia

    en.wikipedia.org/wiki/Midnight

    Though there is no global unanimity on the issue, most often midnight is considered the start of a new day and is associated with the hour 00:00. Strictly speaking, it is incorrect to use "a.m." and "p.m." when referring to noon or midnight. The abbreviation a.m. stands for ante meridiem or before noon, and p.m. stands for post meridiem or ...

  4. Date and time notation in Colombia - Wikipedia

    en.wikipedia.org/wiki/Date_and_time_notation_in...

    Media Noche (Midnight) Madrugada (Early Morning) Mañana (Morning) Medio Día (Noon) Tarde (Afternoon) Noche (Night) Time Span: 12:00 am12:59 am: 1 am - 5:59 am: 6:00 am – 11:59 am: 12:00 pm – 12:59 pm: 1:00 pm – 6:59 pm: 7:00 pm – 11:59 pm Example: Media noche: 3:20 de la madrugada: 8:25 de la mañana: Medio día: 6:30 de la tarde ...

  5. Day - Wikipedia

    en.wikipedia.org/wiki/Day

    In common usage, a day starts at midnight, written as 00:00 or 12:00 am in 24-or 12-hour clocks, respectively. Because the time of midnight varies between locations, time zones are set up to facilitate the use of a uniform standard time.

  6. Date and time notation in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Date_and_time_notation_in...

    Date and time notation in the United Kingdom records the date using the day–month–year format (31 December 1999, 31/12/99 or 31/12/1999). The time can be written using either the 24-hour clock (23:59) or the 12-hour clock (11:59 p.m.), either with a colon or a full stop (11.59 p.m.).

  7. Roman timekeeping - Wikipedia

    en.wikipedia.org/wiki/Roman_timekeeping

    The English term noon is also derived from the ninth hour. This was a period of prayer initially held at three in the afternoon but eventually moved back to midday for unknown reasons. [12] The change of meaning was complete by around 1300. [13] The terms a.m. and p.m. are still used in the 12-hour clock, as opposed to the 24-hour clock.

  8. Noon - Wikipedia

    en.wikipedia.org/wiki/Noon

    Noon (also known as noontime or midday) is 12 o'clock in the daytime. It is written as 12 noon, 12:00 m. (for meridiem, literally 12:00 midday), 12 p.m. (for post meridiem, literally "after midday"), 12 pm, or 12:00 (using a 24-hour clock) or 1200 (military time). Solar noon is the time when the Sun appears to contact the local celestial meridian.

  9. Hour - Wikipedia

    en.wikipedia.org/wiki/Hour

    In the modern 12-hour clock, counting the hours starts at midnight and restarts at noon. Hours are numbered 12, 1, 2, ..., 11. Hours are numbered 12, 1, 2, ..., 11. Solar noon is always close to 12 noon (ignoring artificial adjustments due to time zones and daylight saving time ), differing according to the equation of time by as much as ...