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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"). [1] [2] Each period consists of 12 hours numbered: 12 (acting as 0), [3] 1, 2, 3, 4
A long minute hand makes one revolution every hour. The face may also include a second hand, which makes one revolution per minute. The term is less commonly used for the time display on digital clocks and watches. A second type of clock face is the 24-hour analog dial, widely used in military and other organizations that use 24-hour time. This ...
The two 12-hour cycles round the main face of the clock remained until about 1900 when the original 24-hour circle was discovered beneath them and they were removed. Further adjustments were made in 1953 and the latest, extensive series of repairs and alterations (some causing controversy amongst horologists) were carried out from 1998 to 2006 ...
One standard day thus went on to become two consecutive equal 12-hour clockfaces in modern clock time. 30 standard days were a standard month, and 12 of those a standard year of 360 days. Some juggling of month lengths to make the 12 months fit the year was still required. Within a day, single hours were unreliable. They came in all sizes.
In most parts of the world times are shown using the 24-hour clock (although in the United States the 12-hour clock, with the addition of "am/A" or "pm/P" or with pm times in bold, is more often used). If services run at the same minutes past each hour for part of the day, the legend "and at the same minutes past each hour" or similar wording ...
The 12-hour clock is the dominant format in Ireland, although the 24-hour clock is gaining in use. [2] In the Irish language, the 12-hour clock is used. The abbreviation a.m. is used, but it stands for ar maidin ("in the morning") rather than ante meridiem. Times after 12:00 are described as (for example) 3:00 i.n., short for iarnóin ...
A world clock is a clock which displays the time for various cities around the world. The display can take various forms: The clock face can incorporate multiple round analogue clocks with moving hands or multiple digital clocks with numeric readouts, with each clock being labelled with the name of a major city or time zone in the world. The ...
Times after 12 noon are labeled de la tarde ("in the afternoon") before sunset and de la noche ("at night") after sunset. The system for minutes is similar to the one used in the English language, with hours expressed first, followed by minutes. The word y ("and") is used to denote minutes past or after the hour (e.g. las cinco y diez for "ten ...