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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. Civil time - Wikipedia

    en.wikipedia.org/wiki/Civil_time

    Roman daytimes were called hora (hours), with the morning hour as hora prima. The night was divided into four sections called vigilia (night watch), two before midnight and two after. [ 4 ] 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 ...

  5. 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 ...

  6. 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 ...

  7. Netflix’s ‘The Midnight Club’ breaks world record for most ...

    www.aol.com/entertainment/netflix-midnight-club...

    Netflix's new spooky teen series is scaring the pants off of people worldwide.

  8. Greenwich Mean Time - Wikipedia

    en.wikipedia.org/wiki/Greenwich_Mean_Time

    [5] [6] Today, Universal Time usually refers to Coordinated Universal Time (UTC) or UT1; [7] English speakers often use GMT as a synonym for UTC. [8] For navigation, it is considered equivalent to UT1 (the modern form of mean solar time at 0° longitude); but this meaning can differ from UTC by up to 0.9 s.

  9. What Is '@Midnight'? Everything to Know About the Possible ...

    www.aol.com/midnight-everything-know-possible...

    The Late Late Show with James Corden is coming to an end later this year, and it looks like a shake-up is in the works. Instead of looking for a new host, CBS is instead looking for an altogether ...