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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"). [1] [2] Each period consists of 12 hours numbered: 12 (acting as 0), [3] 1, 2, 3, 4

  3. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    In American English, the term military time is a synonym for the 24-hour clock. [8] In the US, the time of day is customarily given almost exclusively using the 12-hour clock notation, which counts the hours of the day as 12, 1, ..., 11 with suffixes a.m. and p.m. distinguishing the two diurnal repetitions of this sequence.

  4. Dayparting - Wikipedia

    en.wikipedia.org/wiki/Dayparting

    In the United States and Canada, prime time network programs start one hour earlier on Sunday evenings (6:00 or 7:00 p.m., depending on the time zone) than on Monday through Saturdays, an exception to the since-repealed Prime Time Access Rule as part of a 1975 revision that allowed networks to program the time slot on Sundays.

  5. Midnight - Wikipedia

    en.wikipedia.org/wiki/Midnight

    Solar midnight is the time opposite to solar noon, when the Sun is closest to the nadir, and the night is equidistant from sunset and sunrise. Due to the advent of time zones , which regularize time across a range of meridians , and daylight saving time , solar midnight rarely coincides with 12 midnight on the clock.

  6. Why your phone doesn’t make for the best alarm clock - AOL

    www.aol.com/one-small-thing-help-sleep-130059433...

    “If my phone is in another room, I am less likely to get out from under my warm covers, and thus sleep those 2 hours between 10 and midnight, i.e., getting the 8 hours my brain and body thrive ...

  7. Waking at the same time each night reveals details ... - AOL

    www.aol.com/article/2016/07/14/waking-at-the...

    Between the hours of 1 and 3 in the morning is when the body cleans itself out, removing waste materials from the blood and other tissues. Your liver is the big organ in charge of detoxing, and so ...

  8. 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. This daily cycle drives circadian rhythms in many organisms, which are vital to many life processes.

  9. Why do we work 9 to 5? The history of the eight-hour workday

    www.aol.com/why-9-5-history-eight-105902493.html

    The first chassis on the assembly aisle at the Ford factory in Long Beach, California. In 1926, Ford Motor Company become one of the first employers to institute an eight-hour-a-day, five-day ...