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  2. 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 ...

  3. 24-hour news cycle - Wikipedia

    en.wikipedia.org/wiki/24-hour_news_cycle

    The 24-hour news cycle (or 24/7 news cycle) is 24-hour investigation and reporting of news, concomitant with fast-paced lifestyles. The vast news resources available in recent decades have increased competition for audience and advertiser attention, prompting media providers to deliver the latest news in the most compelling manner in order to ...

  4. Circadian rhythm - Wikipedia

    en.wikipedia.org/wiki/Circadian_rhythm

    Circadian rhythm. A circadian rhythm ( / sərˈkeɪdiən / ), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours. Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment).

  5. 24-hour analog dial - Wikipedia

    en.wikipedia.org/wiki/24-hour_analog_dial

    The 24th hour on the right side of the dial is typical for the old Italian time system of 24 hours counted from dusk. Clocks and watches with a 24-hour analog dial have an hour hand that makes one complete revolution, 360°, in a day (24 hours per revolution). The more familiar 12-hour analog dial has an hour hand that makes two complete ...

  6. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    The number 12 is paired either with a 00 or a 24, while the numbers 1 through 11 are paired with the numbers 13 through 23, respectively. This modification allows the clock to also be read in 24-hour notation. This kind of 12-hour clock can be found in countries where the 24-hour clock is preferred. Use by country

  7. 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. ISO 8601

  8. World clock - Wikipedia

    en.wikipedia.org/wiki/World_clock

    The World Clock in Alexanderplatz displays 146 cities in all 24 time zones on its head. It could also be a picture map of the world with embedded analog or digital time-displays. A moving circular map of the world, rotating inside a stationary 24-hour dial ring. Alternatively, the disc can be stationary and the ring moving.

  9. Thirteenth stroke of the clock - Wikipedia

    en.wikipedia.org/wiki/Thirteenth_stroke_of_the_clock

    Why do 24-hour clocks not strike thirteen? Most countries around the world use the 24-hour system for technical purposes and in documents such as timetables; the United States is an exception, although US military bodies do use the 24-hour clock. Most digital clocks can be set to show the time as, for example, 13:00, and this is frequently done.

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