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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 system, as opposed to the 12-hour clock, is the ...
The 24th hour on the right side of the dial is typical for the old Italian time system of 24 hours counted from dusk. Clocks and watches with a 24-hour analog dial have an hour hand that makes one complete revolution, 360°, in a day (24 hours per revolution). The more familiar 12-hour analog dial has an hour hand that makes two complete ...
The only other widely used clock face today is the 24 hour analog dial, because of the use of 24 hour time in military organizations and timetables. Before the modern clock face was standardized during the Industrial Revolution , many other face designs were used throughout the years, including dials divided into 6, 8, 10, and 24 hours.
The 24-hour clock is used in military, public safety, and scientific contexts in the United States. It is best known for its use by the military and is therefore commonly called " military time ". In U.S. military use, 24-hour time is traditionally written without a colon (1800 instead of 18:00).
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").
The Gate Clock originally indicated astronomical time, in which the counting of the 24 hours of each day starts at noon. The clock was changed in the 20th century to indicate Greenwich Mean Time, in which the counting of the 24 hours of each day starts at midnight. The Gate Clock continues to show Greenwich Mean Time and is not adjusted for ...
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