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  2. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    This eventually evolved into the two 12-hour periods which are used today, one called "a.m." starting at midnight and another called "p.m." starting at noon. Noon itself is rarely abbreviated today; but if it is, it is denoted "m." [1] The 12-hour clock can be traced back as far as Mesopotamia and ancient Egypt. [7]

  3. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    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 most commonly used time notation in the world today, [A] and is used by the international standard ISO 8601. [1]

  4. Midnight - Wikipedia

    en.wikipedia.org/wiki/Midnight

    Midnight at Metz railway station, in France. Midnight is the transition time from one day to the next – the moment when the date changes, on the local official clock time for any particular jurisdiction. By clock time, midnight is the opposite of noon, differing from it by 12 hours.

  5. The 'Doomsday Clock' just moved closer to midnight. Here's ...

    www.aol.com/news/doomsday-clock-just-moved...

    It is possible for the clock to move away from midnight, which means that humanity has taken steps within the past year to reduce the risks of the end of the world. "There is hope.

  6. Civil time - Wikipedia

    en.wikipedia.org/wiki/Civil_time

    The Romans originally counted the morning hours backwards: "3 a. m." or "3 hours ante meridiem" meant "three hours before noon", in contrast to the modern meaning "three hours after midnight". This ancient division has survived in the Liturgy of the Hours : Prime , Terce , Sext , and Nones are named after the first, third, sixth and ninth hours ...

  7. Doomsday clock ticks down, closest ever to "global catastrophe"

    www.aol.com/doomsday-clock-ticks-down-closest...

    The Doomsday clock was set at 89 seconds to midnight on Tuesday morning, putting it the closest the world has ever been to what scientists deem "global catastrophe." The decades-old international ...

  8. Roman timekeeping - Wikipedia

    en.wikipedia.org/wiki/Roman_timekeeping

    The Roman day starting at dawn survives today in the Spanish word siesta, literally the sixth hour of the day (sexta hora). [ 11 ] 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 ...

  9. ‘Haggler After Midnight,' Who Negotiates What He’ll Steal ...

    www.aol.com/haggler-midnight-negotiates-ll-steal...

    The "Haggler after Midnight" is “typically after cash or electronics,” police shared with NBC 4 New York. An award is being offered to help find the suspect and lead to his arrest, per the outlet.