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  2. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    24-hour digital clock in Miaoli HSR station.. 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 last ...

  3. Military designation of days and hours - Wikipedia

    en.wikipedia.org/wiki/Military_designation_of...

    H-Hour. The specific time at which an operation or exercise commences, or is due to commence (this term is used also as a reference for the designation of days/hours before or after the event). (NATO); also known as 'Zero Hour'. I-Day. Used informally within the U.S. military bureaucracy to variously designate the "Implementation Day" or the ...

  4. 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 ... Dating to c. 1500 BC, ... particularly "military time", of the 24-hour clock, ...

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

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

    The 24-hour clock is used in military, public safety, and scientific contexts in the United States. [4] It is best known for its use by the military and is therefore commonly called "military time". In U.S. military use, 24-hour time is traditionally written without a colon (1800 instead of 18:00).

  6. Date and time representation by country - Wikipedia

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

    In Czech quarters and halves always refer to the following hour, e.g. čtvrt na osm (quarter on eight) meaning 7:15, půl osmé (half of eight) meaning 7:30 and tři čtvrtě na osm (three-quarters on eight) meaning 7:45. This corresponds to the time between 7:00 and 8:00 being the eighth hour of the day (the first hour starting at midnight).

  7. The Campaign for North Africa - Wikipedia

    en.wikipedia.org/wiki/The_Campaign_for_North_Africa

    The Campaign for North Africa has been called the longest board game ever produced, with estimates that a full game would take 1,500 hours to complete. [1] [2] Reviewer Luke Winkie pointed out that "If you and your group meets for three hours at a time, twice a month, you’d wrap up the campaign in about 20 years."

  8. Marine Corps Martial Arts Program - Wikipedia

    en.wikipedia.org/wiki/Marine_Corps_Martial_Arts...

    Marines demonstrate MCMAP in Times Square for Fleet Week 2010 2 MCMAP instructors with General James L. Jones in January 2002 at MCRD San Diego. The MCMAP was officially created by Marine Corps Order 1500.54, published in 2002, as a "revolutionary step in the development of martial arts skills for Marines and replaces all other close-combat related systems preceding its introduction."

  9. Coordinated Universal Time - Wikipedia

    en.wikipedia.org/wiki/Coordinated_Universal_Time

    Coordinated Universal Time. Current time zones. Coordinated Universal Time ( UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce.