12 midnight a.m. 12 noon 12 midnight a japanese legal convention dubious discuss 16 0:00.m. Chicago manual of Style 17 noon 12:00. Canadian Press, 18 uk standard 19 Midnight noon Midnight Associated Press style 20 — noon midnight nist 21 midnight b 12:01.m. Noon midnight b 11:59.m. a b c d e these styles are ambiguous with respect to whether midnight is at the start or end of each day. a b nist recommends using 11:59.
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O'clock itself may be omitted, telling a time as four. Minutes 01" to 09" are usually pronounced as oh one to oh nine ( nought or zero can also be used instead of oh ). Minutes 10" to 59" are pronounced as their usual number-words. For instance, 6:02.m. Can be pronounced six oh two. Could be told as six thirty-two. Confusion at noon and midnight edit time according to various conventions resume device or style midnight Start of day noon Midnight End of day written 24-hour time, iso 8601 00:00 12:00 24:00. Government Printing Office (1953) 13 midnight a noon 12 o'clock noon. Government Printing Office (2000) 14 midnight a.m. Government Printing Office (2008) 15.m.
This meaning follows the pattern choices of many germanic and Slavic languages, including Dutch, danish, finnish, hungarian, russian and Swedish. Formal speech and times to the minute edit "O'clock" redirects here. For the o'clock watch, see o bag. Minutes may be shredder expressed as an exact number of minutes past the hour specifying the time of day (e.g., 6:32.m. Additionally, when expressing the time using the "past (after or "to (before formula, it is conventional to choose the number of minutes below 30 (e.g.,.32 pm is conventionally "twenty-eight minutes to seven" rather than "thirty-two minutes past six. In spoken English, full hours are often represented by the numbered hour followed by o'clock (10:00 as ten o'clock, 2:00 as two o'clock ). This may be followed by the "a.m." or "p.m." designator, though phrases such as in the morning, in the afternoon, in the evening, or at night more commonly follow analog-style terms such as o'clock, half past three, and quarter to four.
Encoding edit In Unicode, there exist symbols for: "a.m." U 33C2 (html 13250 and "p.m." U 33D8 (html 13272. They are meant to be used only with Chinese-japanese-korean character sets, as they take up exactly the same space as one Chinese character. Informal speech and rounding off edit It is common to round a time to the nearest five minutes and express the time as so many minutes past an hour (5:05 is "five past five" or "five oh five formerly written.5 in some publications. A period of 15 minutes is often expressed as "a quarter" (hence 5:15 is "a quarter past five and 30 minutes is expressed as "half" (hence 5:30 is "half past five" or merely "half five. Thus, plan the time would be spoken as 8:45, and " (a) quarter to nine ". 12 Moreover, in situations where the relevant hour is obvious or has been recently mentioned, speakers can use terms "quarter to" and "half past" to avoid elaborate sentences in particularly informal conversations. These forms are often commonly used in television and radio broadcasts that cover multiple time zones at one-hour intervals. Instead of meaning 5:30, the "half five" expression is sometimes used to mean 4:30, or "half-way to five especially for regions such as the American Midwest and other areas that have been particularly influenced by german culture.
Related conventions edit typography edit The terms "a.m." and "p.m." are abbreviations of the latin ante meridiem (before midday) and post meridiem (after midday). Depending on the style guide referenced, the abbreviations "a.m." and "p.m." are variously written in small capitals am" and "pm uppercase letters without a period am" and "pm uppercase letters with periods, or lowercase letters am" and "pm" or, more commonly, "a.m." and "p.m. Some stylebooks suggest the use of a space between the number and the. Citation needed Style guides recommend not using. Without a time preceding it, 10 although doing so can be advantageous when describing an event that always happens before or after noon. The hour/minute separator varies between countries : some use a colon, others use a period (full stop and still others use the letter. In many instances using the 24-hour clock, there is no separator between hours and minutes (0800, read as written,.
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are used in English and Spanish. 9 The equivalents in Greek are.µ. And.µ., respectively, and in Sinhala. ) for ( peravaru, pera - fore, pre) and. ) for ( pasvaru, passē - after, post).
However, noon is rarely abbreviated in any of these languages, noon normally being written in full. In Portuguese, there are two official options and many other used, for example, using 21:45 pm: 21h45 or 21h45min (official ones) or 21:45 or 9:45.m. Most other languages lack formal abbreviations for "before pdf noon" and "after noon and their users use the 12-hour clock only orally and informally. Citation needed however, in many languages, such as Russian and Hebrew, informal designations are used, such as "9 in the morning" or "3 in the night". When abbreviations and phrases are omitted, one may rely on sentence context and societal norms to reduce ambiguity. For example, if one commutes to work at "9:00 9:00. May be implied, but if a social dance is scheduled to begin at "9:00 it may begin at 9:00.m.
This is true in some european nations and Latin America. The 12-hour clock in speech often uses phrases such as in the morning, in the afternoon, in the evening, and at night. Outside of English-speaking countries, the terms. Are seldom used and often unknown. In England, the descriptive phrases were universal until relatively recently;. G., rider's British Merlin almanac for 1795 (published in London) 7 uses them, and so does a similar almanac for 1773.
A typical digital 12-hour alarm clock indicating. With a dot to the left of the hour Computer support edit In most countries, computers by default show the time in 24-hour notation. Most operating systems, including Microsoft Windows and Unix-like systems such as Linux and macos, activate the 12-hour notation by default for a limited number of language and region settings. This behavior can be changed by the user, such as with the windows operating system "Region and Language" settings. 8 Abbreviations edit The latin abbreviations. (often written "am" and "pm "AM" and "pm or "A.M." and "P.M.
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Some analog clock dials have an inner ring of numbers along with the standard 1-to-12 numbered ring. 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 be read also in the 24-hour notation. This kind of 12-hour clock can be found in countries where the 24-hour clock is preferred. Use by writings country edit main article: Date and time representation by country In several countries the 12-hour clock is the dominant written and spoken system of time, predominantly in nations that were part of the former British Empire (the United Kingdom, the United States, australia. though a few others ( Mexico, egypt, and the former American colony of the Philippines ) follow this convention as well. In most countries, however, the 24-hour clock is the standard system used, especially in writing. Some nations use a combination of the two, preferring the 12-hour system in colloquial speech but using the 24-hour system in written form and in formal contexts.
The romans also used a 12-hour clock: daylight was divided into 12 equal hours (thus hours having varying length throughout the year) and the night was divided into four watches. The first mechanical clocks in the 14th century, if they had dials at all, showed all 24 hours, used the 24-hour analog dial, influenced by astronomers' familiarity with the astrolabe and sundial, and their desire to model the earth's apparent motion around the sun. In Northern Europe these dials generally used the 12-hour numbering scheme in Roman numerals, but showed both. This is known as the double-xii system, and can be seen on many surviving clock faces, such as those at Wells and Exeter. Elsewhere in Europe, particularly in Italy, numbering was more likely to be based on the 24-hour system (I to xxiv reflecting plan the Italian style of counting the hours. The 12-hour clock was used throughout the British empire. During the 15th and 16th centuries, the 12-hour analog dial and time system gradually became established as standard throughout Northern Europe for general public use. The 24-hour analog dial was reserved for more specialized applications, such as astronomical clocks and chronometers. Most analog clocks and watches today use the 12-hour dial, on which the shorter hour hand rotates once every 12 hours and twice in one day.
why each day is split into two cycles. Originally there were two cycles; one cycle which could be tracked by the position of the sun (day) followed by one cycle which could be tracked by the moon and stars (night). This would eventually evolve into the two 12-hour periods that started at midnight (a.m.) and noon (p.m.) which are used today. Noon itself is rarely abbreviated today, but if it is, it is denoted. 1 The 12-hour clock can be traced back as far as Mesopotamia and Ancient Egypt. 4 Both an Egyptian sundial for daytime use 5 and an Egyptian water clock for night-time use were found in the tomb of Pharaoh Amenhotep. 6 Dating. 1500 bc, these clocks divided their respective times of use into 12 hours each.
(from the, latin, ante meridiem, meaning before midday ) and. ( post meridiem, meaning past midday ). 2 Each period consists of 12 hours numbered: 12 (acting as zero 3 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and. The 24 hour/day cycle starts at legs 12 midnight (often indicated as. runs through 12 noon (often indicated as. and continues to the midnight at the end of the day. The 12-hour clock was developed over time from the mid-second millennium bc to the 16th century.
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"am and PM" redirects here. For other uses, see. Clock system 12-hour 24-hour, midnight (start of day) thesis 12 midnight 12:00.m. A 00:00 12:01.m. 11:59 12 noon 12:00.m. A 12:00 12:01.m. 23:59, midnight (end of day) shown as start of next day 24:00, the 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods:.