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'12:14' in both analog and digital representations. In the analog clock, the minute hand is on "14" minutes, and the hour hand is moving from "12" to "1" – this indicates a time of 12:14. A ship's radio room wall clock during the age of wireless telegraphy showing '10:09' and 36 seconds'. The green and red shaded areas denote 3 minute periods ...
The time is usually based on a 12-hour clock. A method to solve such problems is to consider the rate of change of the angle in degrees per minute. The hour hand of a normal 12-hour analogue clock turns 360° in 12 hours (720 minutes) or 0.5° per minute. The minute hand rotates through 360° in 60 minutes or 6° per minute. [1]
The hour/minute separator varies between countries: some use a colon, others use a period (full stop), [15] and still others use the letter h. [citation needed] (In some usages, particularly "military time", of the 24-hour clock, there is no separator between hours and minutes. [18] This style is not generally seen when the 12-hour clock is used.)
If the watch is set to uncorrected solar time, both hands point to the sun. In a 12-hour watch, the sun and the hour hand both advance, but not at the same rate; the sun covers 15 degrees per hour, and watch 30. To keep the hour hand on the sun, 12:00 must recede from the zenith at the same rate the hour hand advances.
A hexadecimal clock-face (using the Florence meridian) Hexadecimal time is the representation of the time of day as a hexadecimal number in the interval [0, 1). The day is divided into 10 16 (16 10 ) hexadecimal hours, each hour into 100 16 (256 10 ) hexadecimal minutes, and each minute into 10 16 (16 10 ) hexadecimal seconds.
Fixed several countries, mostly in Oceania. Australia, PNG, NZ and the Pacific Islands all use 12-hour time (except in some exceptional cases e.g flight times) 12:12, 7 May 2024: 2,754 × 1,398 (1.05 MB) Amiria703: Iran (IR) changed to 24 hour (12 hour orally) 21:05, 10 December 2022: 2,754 × 1,398 (1.05 MB) Getsnoopy
The minutes are written with two digits; the hour numbers can be written with or without zero padding (02:05 or 2:05). In oral communication, 12-hours are prominently used since 24-hours are considered very formal. In 12-hours, hour figures are always preceded by the definite article and a.m. or p.m. are never used.
Every digital clock I've ever seen, including embedded systems, follows this de facto convention. If you need to set a clock or alarm to 12:00 on a 12-hour digital clock or embedded system, you better know and use the de facto convention, or you'll get it wrong! And it has never been the case that we switch from am to pm or vice versa at 1:00.