AMAM

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The abbreviation 'AM' stands for Ante Meridiem, which means it is the time before the meridian line has crossed the Sun, or, the time between midnight and 11.59 in the morning. PM stands for Post-Meridiem, which means it is the time after the meridian line has crossed the Sun, or, the time between noon and 11.59 at night. In Japanese usage, midnight is written as 午前0時 (0:00a.m.) and noon is written as 午後0時 (0:00p.m.), making the hours numbered sequentially from 0 to 11 in both halves of the day. Time". Encyclopædia Britannica. Encyclopædia Britannica Online Library Edition . Retrieved 20 November 2013. The use of AM or PM to designate either noon or midnight can cause ambiguity. (subscription required) For different opinions on representation of midday and midnight, see #Confusion at noon and midnight National Library of Australia catalogue entry for Rider's British merlin: for the year of Our Lord God 1795 . Printed for the Company of Stationers, and sold by R. Horsfield, at Stationers-hall, near Ludgate-street. 1795. Archived from the original on 22 May 2013.

Trudgill, Peter (17 May 2020). "Number five-and-twenty: A fading linguistic practice". The New European . Retrieved 13 October 2022.The Latin abbreviations a.m. and p.m. (often written "am" and "pm", "AM" and "PM", or "A.M." and "P.M.") are used in English and Spanish. [12] The equivalents in Greek are π.μ. and μ.μ., respectively, and in Sinhala පෙ.ව. ( pe.va.) for පෙරවරු ( peravaru, පෙර pera – fore, pre) and ප.ව. ( pa.va.) for පස්වරු ( pasvaru, පස්සේ 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 others used, for example, using 21:45, 21h45 or 21h45min (official ones) or 21:45 or 9:45p.m. In Irish, a.m. and i.n. are used, standing for ar maidin ("in the morning") and iarnóin ("afternoon") respectively. The Tongue and Quill (PDF). US Air Force. 27 May 2015. p.356. Archived from the original (PDF) on 26 November 2020 . Retrieved 26 October 2021. Air Force Handbook 33-337.

Some style guides suggest the use of a space between the number and the a.m. or p.m. abbreviation. [ citation needed] Style guides recommend not using a.m. and p.m. without a time preceding it. [15] time of day, elapsed time". Resources of the Language Portal of Canada. 22 October 2020 . Retrieved 27 January 2023. E. G. Richards in his book Mapping Time (1999) provided a diagram in which 12a.m. means noon and 12p.m. means midnight. [32] AM". The American Heritage Dictionary of the English Language (Fifthed.). 2011. Archived from the original on 9 January 2014.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", 9:00a.m. may be implied, but if a social dance is scheduled to begin at "9:00", it may begin at 9:00p.m. 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"), [ citation needed] uppercase letters without a period ("AM" and "PM"), uppercase letters with periods, or lowercase letters ("am" and "pm" or, [13] "a.m." and "p.m."). [ citation needed] With the advent of computer generated and printed schedules, especially airlines, advertising, and television promotions, the "M" character is often omitted as providing no additional information as in "9:30A" or "10:00P". [14] a b Chicago Manual of Style (17thed.). University of Chicago Press. 2017. paragraph 9.38. ISBN 978-0-226-28705-8. Although noon can be expressed as 12:00 m. (m = meridies), very few use that form. 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. This meaning follows the pattern choices of many Germanic and Slavic languages, including Serbo-Croatian, Dutch, Danish, Russian and Swedish, as well as Hungarian and Finnish. a b "National Physical Laboratory, FAQ-Time". Archived from the original on 3 March 2015 . Retrieved 11 January 2015.