See twenty-four-hour clock on Wiktionary
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"extra": "(“a timekeeping convention in which the 24 hours of the day are treated as a single period rather than two sets of 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”)",
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"ref": "1893, “Time and Its Landmarks”, in J. C. Thomas, editor, Manual of Useful Information […] (The Working Teachers’ Library; V), Chicago, Ill.: The Werner Company, →OCLC, page 41:",
"text": "Twenty-four hour clock time is gaining in favor.",
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"ref": "1899 February 23, Fred J. Miller, editor, American Machinist: A Practical Journal of Machine Construction, volume XXII, number 8, New York, N.Y.: American Machinist Press, →ISSN, →OCLC, page 33-157, column 3:",
"text": "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.",
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"ref": "1942, Harold E. Baughman, “Civil Air Communications: Reprinted from Manual of Operations: Chapter B—Communications Section”, in Baughman’s Aviation Dictionary and Reference Guide […], 2nd edition, Los Angeles, Calif.: Aero Publishers, →OCLC, paragraphs B5.1072–B5.10720, page 363:",
"text": "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.",
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"ref": "1978, Lawrence D. Pedde, Warren E. Foote, LeRoy F. Scott, Danny L. King, Dave L. McGalliard, “Featured Units”, in Metric Manual, Denver, Colo.: [United States Government Printing Office for the] Bureau of Reclamation, U.S. Department of the Interior, →OCLC, page 43:",
"text": "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.",
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"ref": "1989, Jane Briehl, “Thirty-eight Activity Cards [Minute Math Card #2: The Twenty-four Hour Clock!]”, in All about Time: Curriculum-based Activities for Telling Time & Much More!: Grades 4–6, [Napanee, Ont.]: S & S Learning Materials, →ISBN, page 23:",
"text": "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.",
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"ref": "2016, Caroline Potter, “Satie’s Texted Piano Works”, in Erik Satie: A Parisian Composer and His World, Woodbridge, Suffolk: The Boydell Press, Boydell & Brewer, →ISBN, page 130:",
"text": "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.'",
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"ref": "2024, Bernard K. Means, “Ring-shaped Settlements and Exploratory Circular Statistics: A Graphical Approach”, in Martin Menz, Analise Hollingshead, Haley Messer, editors, The Archaeology of Arcuate Communities: Spatial Patterning and Settlement in the Eastern Woodlands (A Dan Josselyn Memorial Publication), Tuscaloosa, Ala.: University of Alabama Press, →ISBN, part II (Organizing Principles of Arcuate Communities), page 95:",
"text": "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.",
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"Alternative form of 24-hour clock (“a timekeeping convention in which the 24 hours of the day are treated as a single period rather than two sets of 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”)"
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"word": "twenty-four-hour clock"
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"ref": "1899 February 23, Fred J. Miller, editor, American Machinist: A Practical Journal of Machine Construction, volume XXII, number 8, New York, N.Y.: American Machinist Press, →ISSN, →OCLC, page 33-157, column 3:",
"text": "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.",
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"text": "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.",
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"text": "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.",
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"text": "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.",
"type": "quote"
},
{
"ref": "2016, Caroline Potter, “Satie’s Texted Piano Works”, in Erik Satie: A Parisian Composer and His World, Woodbridge, Suffolk: The Boydell Press, Boydell & Brewer, →ISBN, page 130:",
"text": "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.'",
"type": "quote"
},
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"ref": "2024, Bernard K. Means, “Ring-shaped Settlements and Exploratory Circular Statistics: A Graphical Approach”, in Martin Menz, Analise Hollingshead, Haley Messer, editors, The Archaeology of Arcuate Communities: Spatial Patterning and Settlement in the Eastern Woodlands (A Dan Josselyn Memorial Publication), Tuscaloosa, Ala.: University of Alabama Press, →ISBN, part II (Organizing Principles of Arcuate Communities), page 95:",
"text": "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.",
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"word": "twenty-four-hour clock"
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This page is a part of the kaikki.org machine-readable All languages combined dictionary. This dictionary is based on structured data extracted on 2025-02-26 from the enwiktionary dump dated 2025-02-21 using wiktextract (ce0be54 and f2e72e5). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.
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