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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]
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.
The confusion that can arise from having two of every “o’clock” a day is definitely a solid argument in favor of using military time. So, in the 12-hour system, which 12:00 is which? So, in ...
The natural day (dies naturalis) ran from sunrise to sunset. [6] The hours were numbered from one to twelve as hora prima, hora secunda, hora tertia, etc. To indicate that it is a day or night hour, Romans used expressions such as for example prima diei hora (first hour of the day), and prima noctis hora (first hour of the night). [7]
The order in which the year, month, and day are represented. (Year-month-day, day-month-year, and month-day-year are the common combinations.) How weeks are identified (see seven-day week) Whether written months are identified by name, by number (1–12), or by Roman numeral (I-XII). Whether the 24-hour clock, 12-hour clock, or 6-hour clock is ...
7th Prahara of the Day(2nd of the Night) (Ratri): 9pm to 12am (Ardha-Ratri): Sleep time or time for other activities. Typically, 1am is termed Ardha-Ratri, although there is no single definition of Ardha-Ratri which is used to imply the 'middle of the night'. 8th Prahara of the Day(3rd of the Night)(Ratri): 12am to 3am: Sleep time.
The day definitely does NOT begin at 12am... the day is divided by noon at the meridian... so am is ante meridiem (the time before midday) and post meridiem (the time after midday). Midnight is definitely after midday so is 12pm. 12am is noon. Using the 24hr clock, 0001 is 12:01am Marlarkey 23:47, 9 October 2024 (UTC)
The "midnight" term can be avoided altogether if the end of the day is noted as 24:00 and the beginning of the day as 00:00. While both notations refer to the same moment in time, the choice of notation allows its association with the previous night or with the following morning. "Midnight" can be augmented with additional disambiguating ...