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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. Day - Wikipedia

    en.wikipedia.org/wiki/Day

    The full day covering both the dark and light periods, beginning from the start of the dark period or from a point near the middle of the dark period; A full dark and light period, sometimes called a nychthemeron in English, from the Greek for night-day; [18] or more colloquially the term 24 hours. In other languages, 24 hours is also often ...

  4. Afternoon - Wikipedia

    en.wikipedia.org/wiki/Afternoon

    Afternoon is often defined as the period between noon and sunset. [2] If this definition is adopted, the specific range of time varies in one direction: noon is defined as the time when the sun reaching its highest point in the sky, [3] but the boundary between afternoon and evening has no standard definition.

  5. Roman timekeeping - Wikipedia

    en.wikipedia.org/wiki/Roman_timekeeping

    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.

  6. Daytime - Wikipedia

    en.wikipedia.org/wiki/Daytime

    The period of daytime from the standpoint of a surface observer is roughly defined as the period between sunrise, when the Earth's rotation towards the east first causes the Sun's disc to appear above the horizon, to sunset, when the continuing rotation of the Earth causes the Sun's disc to disappear below the horizon to the west. Because the ...

  7. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    10 days. A period of time analogous to the concept of "week", used by different societies around the world: the ancient Egyptian calendar, the ancient Chinese calendar, and also the French Republican calendar (in which it was called a décade). megasecond: 10 6 s: About 11.6 days. fortnight: 2 weeks: 14 days lunar month: 27 d 4 h 48 min – 29 ...

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    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Dayparting - Wikipedia

    en.wikipedia.org/wiki/Dayparting

    The early fringe occurs in the late afternoon/early evening, from 4:00 to 7:30 p.m., with children's programming having been shown in the early part of the time period until 2012, as well as afternoon and evening news and public affairs shows at 4:00, 5:00, 6:00 and 6:30 p.m., depending on the channel.