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  2. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    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").

  3. Midnight - Wikipedia

    en.wikipedia.org/wiki/Midnight

    Midnight is the transition time from one day to the next – the moment when the date changes, on the local official clock time for any particular jurisdiction. By clock time, midnight is the opposite of noon, differing from it by 12 hours. Solar midnight is the time opposite to solar noon, when the Sun is closest to the nadir, and the night is ...

  4. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    The modern 24-hour clock is the convention of timekeeping in which the day runs from midnight to midnight and is divided into 24 hours. This is indicated by the hours (and minutes) passed since midnight, from 00 (:00) to 23 (:59), with 24 (:00) as an option to indicate the end of the day. This system, as opposed to the 12-hour clock, is the ...

  5. Witching hour - Wikipedia

    en.wikipedia.org/wiki/Witching_hour

    13th-century CE portrayal of an unclean spirit. In folklore, the witching hour or devil's hour is a time of night that is associated with supernatural events, whereby witches, demons and ghosts are thought to appear and be at their most powerful. Definitions vary, and include the hour immediately after midnight, and the time between 3:00 am and ...

  6. Noon - Wikipedia

    en.wikipedia.org/wiki/Noon

    Noon (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.

  7. Date and time notation in the United States - Wikipedia

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

    In traditional American usage, dates are written in the month–day–year order (e.g. August 9, 2024) with a comma before and after the year if it is not at the end of a sentence [ 2] and time in 12-hour notation (3:03 am). International date and time formats typically follow the ISO 8601 format (2024-08-09) for all-numeric dates, [ 3] write ...

  8. Relative hour - Wikipedia

    en.wikipedia.org/wiki/Relative_hour

    Relative hour ( Hebrew singular: shaʿah zǝmanit / שעה זמנית; plural: shaʿot - zǝmaniyot / שעות זמניות ), sometimes called halachic hour, temporal hour, seasonal hour and variable hour, is a term used in rabbinic Jewish law that assigns 12 hours to each day and 12 hours to each night, all throughout the year. A relative ...

  9. Striking clock - Wikipedia

    en.wikipedia.org/wiki/Striking_clock

    A striking clock is a clock that sounds the hours audibly on a bell, gong, or other audible device. In 12-hour striking, used most commonly in striking clocks today, the clock strikes once at 1:00 am, twice at 2:00 am, continuing in this way up to twelve times at 12:00 mid-day, then starts again, striking once at 1:00 pm, twice at 2:00 pm, and ...