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  2. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    The 12-hour clock is a time convention ... though some phrases such as in the morning, in the afternoon, in the evening, or at night ... (12-hour) 12:00 AM: 12:00 PM:

  3. Canonical hours - Wikipedia

    en.wikipedia.org/wiki/Canonical_hours

    The night from six o'clock in the evening to six o'clock in the morning was divided into four watches or vigils of three hours each, the first, the second, the third, and the fourth vigil. [10] The Night Office is linked to Psalm 119:62: "At midnight I will rise to give thanks unto thee because of thy righteous judgments." [11]

  4. every 6 hours quaque sexta hora q.8.h., q8h every 8 hours quaque octava hora q.a.m., qAM, qam every morning: quaque ante meridiem q.d., qd every day / daily quaque die q.h.s., qhs every night at bedtime quaque hora somni q.d.s, qds, QDS 4 times a day quater die sumendum q.i.d, qid 4 times a day quater in die q.h., qh every hour, hourly quaque hora

  5. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of full minutes that have passed since the last full hour, and ss (00 to 59) is the number of seconds since the ...

  6. Date and time representation by country - Wikipedia

    en.wikipedia.org/wiki/Date_and_time...

    Whether the 24-hour clock, 12-hour clock, or 6-hour clock is used. Whether the minutes (or fraction of an hour) after the previous hour or until the following hour is used in spoken language. The punctuation used to separate elements in all-numeric dates and times. Which days are considered the weekend.

  7. Day - Wikipedia

    en.wikipedia.org/wiki/Day

    A day is the time period of a full rotation of the Earth with respect to the Sun.On average, this is 24 hours (86,400 seconds).As a day passes at a given location it experiences morning, afternoon, evening, and night.

  8. Which Is More Important: Another Hour Of Sleep Or A Morning ...

    www.aol.com/more-important-another-hour-sleep...

    Eliminate screen time at least an hour before bed Dim the lights around you to support your body’s natural Circadian rhythm Create a calming pre-sleep routine to cue to your body that it’s ...

  9. 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.