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The number 12 is paired either with a 00 or a 24, while the numbers 1 through 11 are paired with the numbers 13 through 23, respectively. This modification allows the clock to also be read in 24-hour notation. This kind of 12-hour clock can be found in countries where the 24-hour clock is preferred.
The modern 24-hour clock is the convention of timekeeping in which the day runs from midnight to midnight and is divided into 24 hours. 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 template converts a time from 24-hour to 12-hour format. It accepts one optional unnamed parameter. If the parameter is absent or neither a valid time nor number, the template returns the UTC at the time the page was generated.
The use of the 12-hour clock in numeric writing is not standard practice, not even in informal writing, and writing e.g., "1.30" for 13:30 would be regarded as odd. The actual Dutch terms for a.m. and p.m. are respectively v.m. and n.m. ( voormiddag and namiddag ), but these are very old-fashioned and even more rare than the use of a.m. and p.m ...
There are two systems of telling time in Thailand. Official time follows a 24-hour clock. The 24-hour clock is commonly used in military, aviation, navigation, meteorology, astronomy, computing, logistical, emergency services, and hospital settings, where the ambiguities of the 12-hour clock cannot be tolerated.
[4] The cosine of the hour angle (cos( h )) is used to calculate the solar zenith angle . At solar noon, h = 0.000 so cos( h ) = 1 , and before and after solar noon the cos(± h ) term = the same value for morning (negative hour angle) or afternoon (positive hour angle), so that the Sun is at the same altitude in the sky at 11:00AM and 1:00PM ...
The list of 12 Horae representing the 12 hours of the day is recorded only in Late Antiquity, by Nonnus. [16] The first and twelfth of the Horae were added to the original set of ten: Auge (first light) Anatole (sunrise) Mousike (morning hour of music and study) Gymnastike (morning hour of exercise) Nymphe (morning hour of ablutions) Mesembria ...
The 30th edition of the U.S. Government Style Manual (2008), in sections 9.54 and 12.9b, recommended the use of "12 a.m." for midnight and "12 p.m." for noon. [3] [4] However, the previous 29th edition of the U.S. Government Printing Office Style Manual (2000), in section 12.9, recommended the opposite. There is no further record documenting ...