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  2. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    The American Heritage Dictionary of the English Language states "By convention, 12 AM denotes midnight and 12 PM denotes noon. Because of the potential for confusion, it is advisable to use 12 noon and 12 midnight". [34] E. G. Richards in his book Mapping Time (1999) provided a diagram in which 12 a.m. means noon and 12 p.m. means midnight. [35]

  3. Date and time representation by country - Wikipedia

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

    Punctuation and spacing styles differ, even within English-speaking countries (6:30 p.m., 6:30 pm, 6:30 PM, 6.30pm, etc.). [ citation needed ] Most people who live in countries that use one of the clocks dominantly are still able to understand both systems without much confusion; the statements "three o'clock" and "15:00", for example, are ...

  4. What Do AM and PM Stand For? - AOL

    www.aol.com/am-pm-stand-153002424.html

    AM and PM in military time If you’re using military time, or the 24-hour system, you don’t need AM and PM because there are no duplicate numbers. Instead of going back to 1 after 12:59 (PM ...

  5. Roman timekeeping - Wikipedia

    en.wikipedia.org/wiki/Roman_timekeeping

    The daytime canonical hours of the Catholic Church take their names from the Roman clock: the prime, terce, sext and none occur during the first (prīma) = 6 am, third (tertia) = 9 am, sixth (sexta) = 12 pm, and ninth (nōna) = 3 pm, hours of the day. The English term noon is also derived from the ninth hour.

  6. Time in Ethiopia - Wikipedia

    en.wikipedia.org/wiki/Time_in_Ethiopia

    The convention is that the day begins at 1:00 o'clock in the morning according to the 12-hour cycle (7:00 AM EAT) rather than midnight (12:00 AM EAT). [5] Therefore, the local population could be said to effectively observe UTC-03:00 rather than UTC+03:00 in terms of the numbering of hours and their association with 24-hour days, with the ...

  7. Date and time notation in the United Kingdom - Wikipedia

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

    The time-of-day abbreviations (which are generally lowercase only) are handled in various conflicting styles, including "a.m." and "p.m." with a space between the time and the abbreviation ("1.45 p.m."); [8] "am" and "pm" with a space ("1.45 pm" – recognised as an alternative usage by Oxford); [8] and the same without a space ("1.45pm ...

  8. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    This system, as opposed to the 12-hour clock, is the most commonly used time notation in the world today, [A] and is used by the international standard ISO 8601. [1] A number of countries, particularly English speaking, use the 12-hour clock, or a mixture of the 24- and 12-hour time systems.

  9. 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 ...