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  2. Countdown - Wikipedia

    en.wikipedia.org/wiki/Countdown

    The L-minus clock, a mechanical countdown to the time of launch (L−0). Except for the last few minutes, which are highly automated and rigid, scheduled activities rarely take exactly the scheduled time, and the T-minus clock only corresponds approximately to the time until launch. A hold is the suspension of the normal countdown process ...

  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. Talk:Countdown - Wikipedia

    en.wikipedia.org/wiki/Talk:Countdown

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate; Pages for logged out editors learn more

  5. D-Day (military term) - Wikipedia

    en.wikipedia.org/wiki/D-Day_(military_term)

    D-Day (military term) Coordinates: 49.3333°N 0.5667°W. Battle plans for the Normandy Invasion, the most famous D-Day. In the military, D-Day is the day on which a combat attack or operation is to be initiated. [1] The best-known D-Day is during World War II, on June 6, 1944—the day of the Normandy landings —initiating the Western Allied ...

  6. Template:Countdown-ymd/doc - Wikipedia

    en.wikipedia.org/wiki/Template:Countdown-ymd/doc

    Countdown-ymd/doc. This is a documentation subpage for Template:Countdown-ymd. It may contain usage information, categories and other content that is not part of the original template page. Similar to {{ countdown }}, {{countdown-ymd}} renders a countdown in years, months, days, hours, minutes, and seconds. It also offer different text handling ...

  7. Template (word processing) - Wikipedia

    en.wikipedia.org/wiki/Template_(word_processing)

    The term template, when used in the context of word processing software, refers to a sample document that has already some details in place; those can (that is added/completed, removed or changed, differently from a fill-in-the-blank of the approach as in a form) either by hand or through an automated iterative process, such as with a software assistant.

  8. Collatz conjecture - Wikipedia

    en.wikipedia.org/wiki/Collatz_conjecture

    The Collatz conjecture is: This process will eventually reach the number 1, regardless of which positive integer is chosen initially. That is, for each , there is some with . If the conjecture is false, it can only be because there is some starting number which gives rise to a sequence that does not contain 1.

  9. Template:Countdown - Wikipedia

    en.wikipedia.org/wiki/Template:Countdown

    Please note the following important points before using this template. The time on this countdown clock is GMT (UTC+0) if the event is held in more than a year, the number of years and everything below will be shown; if the event is held in more than a week, the number of weeks and everything below will be shown