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The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translating to "before midday") and p.m. (from Latin post meridiem, translating to "after midday").
Noon (also known as noontime or midday) is 12 o'clock in the daytime. It is written as 12 noon, 12:00 m. (for meridiem, literally 12:00 midday), 12 p.m. (for post meridiem, literally "after midday"), 12 pm, or 12:00 (using a 24-hour clock) or 1200 (military time). Solar noon is the time when the Sun appears to contact the local celestial meridian.
Solar midnight is the time opposite to solar noon, when the Sun is closest to the nadir, and the night is equidistant from sunset and sunrise. Due to the advent of time zones , which regularize time across a range of meridians , and daylight saving time , solar midnight rarely coincides with 12 midnight on the clock.
In the 24-hour time notation, the day begins at midnight, 00:00 or 0:00, and the last minute of the day begins at 23:59. Where convenient, the notation 24:00 may also be used to refer to midnight at the end of a given date [3] — that is, 24:00 of one day is the same time as 00:00 of the following day.
This corresponds to the time between 7:00 and 8:00 being the eighth hour of the day (the first hour starting at midnight). Russian uses the same convention: четверть восьмого (quarter of the eighth hour), полвосьмого (half of eight), без четверти восемь (eight without a quarter) meaning 7:15, 7:30, 7: ...
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 meaning "three hours after midnight".
You are wrong about 12.00am and 12.00pm. The thing is that 12.00am comes directly after 11.59am and is am all the way through until it becomes 1.00pm - 12.00am - 12 midday - until the afternoon - 1 in the afternoon. Likewise, 12.00pm is 12 o'clock midnight and the time only becomes am (morning) when it becomes 1 in the morning - 1.00am.
In the 1970s, and early 1980s, local programming also included a weekly public affairs show hosted by Gabe Pressman, the New York edition of PM Magazine, and Midday Live, a daily talk/information show hosted by Lee Leonard, and later by Bill Boggs. The station also carried movies, cartoons, off-network sitcoms, drama series and a prime time ...