24-hour clock

English 2025 February 28 Etymology thumb|A digital alarm clock displaying a time of 14:19 according to the 24-hour clock (2:19 p.m. according to the 12-hour clock). From en mul 24 hour clock. Pronunciation en /ˌtwɛntiˈfɔːɹˌaʊə ˈklɒk/ RP en LL-Q1860 (eng)-Vealhurl-24-hour clock.wav Southern England en /ˌtwɛntiˈfɔɹˌaʊəɹ ˈklɔk/ [-ɾi-] GA /-ˈklɑk/ cot-caught en ɒk 5 Noun mul 24-hour clock A timekeeping convention in which the mul 24 hours of the day are treated as a single period rather than two sets of mul 12 hours, with the result that midnight is indicated as 00:00 (or sometimes 24:00), and the hours from 1:00 to 11:00 p.m. as 13:00 to 23:00. en continental time<q:chiefly UK> military time<q:chiefly US> en 12-hour clock twelve-hour clock en 1893 Time and Its Landmarks J. C. Thomas Manual of Useful InformationEmbracing More than 100,000 Facts, Figures and Fancies, Drawn from Every Land and Language, and Carefully Classified for the Ready Reference of Teachers, Students and the Family Circle. The Working Teachers’ Library V Chicago, Ill. The Werner Company 41 https://archive.org/details/manualofusefulin00thom/page/41/mode/1up 8738417 Twenty-four hour clock time is gaining in favor. en 23 February 1899 w:Fred J. Miller American Machinist: A Practical Journal of Machine Construction New York, N.Y. American Machinist Press XXII 8 !33-157 https://archive.org/details/sim_american-machinist_1899-02-23_22_8/page/n26/mode/1up 3 1041-7958 173857249 The American Society of Civil Engineers recently announced a meeting of the society to occur at their house in New York at 20.30 o'clock, thus springing the twenty-four hour clock system upon those who wished to attend, and causing some inquiries and explanations as to the time intended. Commodore Melville, who was to be present, was one of those who had to inquire and to be informed that 8.30 P. M. was intended. en 1909 November James Arthur Time and Its Measurement: Part IV H[enry] H[aven] Windsor w:Popular Mechanics Chicago, Ill. Popular Mechanics Co. 12 5 627 https://books.google.com/books?id=Md8DAAAAMBAJ&pg=PA627 1 0032-4558 506031407 The sidereal clock of the astronomer does run to a regular motion; but our 24-hour clocks do not, as we shall see later. en 1942 Harold E. Baughman Civil Air Communications: Reprinted from Manual of Operations: Chapter B—Communications Section Baughman’s Aviation Dictionary and Reference GuideAero-thesaurus 2nd Los Angeles, Calif. w:Aero Publishers paragraphs B5.1072–B5.10720 363 https://books.google.com/books?id=IRwZAAAAIAAJ&pg=PA363 1705188 Time shall be stated in exactly four figures utilizing the twenty-four clock basis. Midnight is 0000, never 2400. The last hour of the twenty-four hour clock day begins at 2300. The last minute of the hour begins at 2359 and ends at 0000, which is the beginning of the first minute ending at 0001 of the first hour of the next day. en 1961 December Talking of Trains: 24hr Clock Experiment at York Trains Illustrated London w:Ian Allan Publishing 712 0141-9935 35845948 Train and steamer services to and from the Continent, including the boat trains in England, have long had 24hr clock indications, mainly to conform with the practice of connecting Continental railways, for Irish services are exempt. en 1978 Lawrence D. Pedde; Warren E. Foote; LeRoy F. Scott; Danny L. King; Dave L. McGalliard Featured Units Metric Manual Denver, Colo. [United States Government Printing Office for the] Bureau of Reclamation, U.S. Department of the Interior 43 https://books.google.com/books?id=E6BLn01jRz8C&pg=PA43 880019611 Twenty-four-hour clock.—The use of the 24-hour clock eliminates the use of a.m. and p.m. Giving the time from midnight to 12.59 remains unchanged; the remaining customary afternoon times are increased by 12. en 1989 Jane Briehl Thirty-eight Activity Cards [Minute Math Card #2: The Twenty-four Hour Clock!] All about Time: Curriculum-based Activities for Telling Time & Much More!: Grades 4–6 [Napanee, Ont.] S & S Learning Materials 23 https://books.google.com/books?id=10wsFJTsVCYC&pg=PA23 978-1-55035-117-0 The twenty-four hour clock is used by railroads, airports and the military because there is no need to add a.m. or p.m. The number on the clock immediately tells you if it is before or after noon. Eight thirty in the morning would be 08:30. Eight thirty at night would be 20:30. en 2016 Caroline Potter Satie’s Texted Piano Works Erik Satie: A Parisian Composer and His World Woodbridge, Suffolk The Boydell Press, Boydell & Brewer 130 https://books.google.com/books?id=3_KjCwAAQBAJ&pg=PA130 978-1-78327-083-5 Whiting i.e., Stephen Moore Whiting, Satie the Bohemian (1999), page 410 remarks that 'Erik Satie was evidently fascinated by the phenomenon of the government changing the designation of hours through simple imposition of the 24-hour clock. […] In 1952, René Chalupt recalled that Satie, "whenever he fixed the time of a meeting … would use both the new and old designation: 'I'll be there at 1800 hrs (6 o'clock old style)'".' The benefits and drawbacks of the twenty-four-hour clock were a topic of debate in early twentieth-century France. The guidebook of the Paris Exposition in 1900 states: 'Let's remember that Belgium is the only country to have officially adopted the 24-hour clock, just as the Observatory of Paris has done since 10 January 1900.' en 2024 Bernard K. Means Ring-shaped Settlements and Exploratory Circular Statistics: A Graphical Approach Martin Menz; Analise Hollingshead; Haley Messer The Archaeology of Arcuate Communities: Spatial Patterning and Settlement in the Eastern Woodlands A Dan Josselyn Memorial Publication Tuscaloosa, Ala. w:University of Alabama Press part II (Organizing Principles of Arcuate Communities) 95 https://books.google.com/books?id=9j38EAAAQBAJ&pg=PA95 978-0-8173-2197-0 With circular or directional data, there is no true zero. The lowest value in a circular distribution is the same as its highest value. Common examples cited to illustrate this point are twenty-four hour clocks and twelve-month calendars. Alternative forms en twenty-four hour clock twenty-four-hour clock Related terms en 24-hour flu 24-hour day,twenty-four hour day twenty-four hours a day 24/7,twenty-four seven Translations timekeeping convention in which the 24 hours of the day are each treated as a single period Arabic: ar نظام 24 ساعة ? Armenian: hy ժամանուններ Bengali: bn ২৪-ঘণ্টার ঘড়ি Bulgarian: bg 24-часов часовник Catalan: ca sistema horari de 24 hores m Chinese: Mandarin: cmn 二十四小時制 èrshísìxiǎoshízhì Chuvash: cv талӑк вӑхӑчӗ Finnish: fi 24 tunnin kello French: fr système horaire sur 24 heures m Georgian: ka 24-საათიანი ფორმატი, ka დროის 24-საათიანი ფორმატი, ka 24-საათიანი საათი German: de 24-Stunden-Zählung f, de astronomische Stundenzählung f Hebrew: he שעון בן 24 שעות ? Hindi: hi 24 घंटे की घड़ी Indonesian: id sistem 24 jam Italian: it sistema orario a 24 ore m Japanese: ja 24時制 にじゅうよじせい, nijiyuuyojisei Korean: ko 24시간제(二十四時間制) Macedonian: mk 24-часовен часовник m Malay: ms jam 24 jam Norwegian: Bokmål: nb 24-timersklokke m f Persian: fa ساعت بیست‌وچهار ساعته Polish: pl system dwudziestoczterogodzinny m Russian: ru 24-часовой формат времени n Spanish: es sistema horario de 24 horas m Swedish: sv 24-timmarsklocka c Tagalog: tl 24-oras na orasan Tajik: tg шабонарӯз Turkish: tr 24 saatlik zaman Tuvan: tyv время суток Ukrainian: uk 24-годинний формат часу m Vietnamese: vi 24 giờ đồng hồ Further reading twenty-four-hour n 9899118230 September 2024 en noun-noun compound nouns en Timekeeping