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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
International standard ISO 8601 (Representation of dates and times) defines unambiguous written all-numeric big-endian formats for dates, such as 2022-12-31 for 31 December 2022, and time, such as 23:59:58 for 23 hours, 59 minutes, and 58 seconds.
[12] Date Time Group format, used most often in operation orders. This format uses DDHHMMZMONYY, with DD being the two-digit day, HHMM being the time on a 24-hour clock, Z being the timezone code, MON being the three-letter month, and YY being the two-digit year. For example, 041200ZFEB23 is noon, UTC, on 4 Feb 2023. [13]
The current time in Darwin is 12:44 am on 4 December 2024 (use {{12-hour time|offset=9 hours 30 min}} not {{12-hour time|9.5}}) The default date format is day month year. For month day year use {{12-hour time|format=mdy}}, for example 3:14 pm on December 3, 2024; The default is not to show seconds or the day of the week. To display these use ...
The relative phrases are exclusive to the 12-hour clock, just as the "(hour) Uhr (minutes)" format is exclusive to the 24-hour clock. For hours greater than 12 and non-zero minutes, "Uhr" is sometimes omitted, especially for the half hours between 13:30 and 19:30.
ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data.It is maintained by the International Organization for Standardization (ISO) and was first published in 1988, with updates in 1991, 2000, 2004, and 2019, and an amendment in 2022. [1]
To avoid confusion, time on schedules and public notices are typically formatted in the 24-hour system, so the times 19:45 and 07:45 are understood to be 12 hours apart from each other. Spoken Chinese predominantly uses the 12-hour system and follows the same concept as A.M. (上午; shàngwǔ) and P.M. (下午; xiàwǔ). However, these ...
Date and time notation in Italy records the date using the day–month–year format (31 gennaio 2025 or 31/1/2025). The time is written using the 24-hour clock (20:15); in spoken language and informal contexts, the 12-hour clock is more commonly adopted, but without using "a.m." or "p.m." suffixes (8:15).