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  2. Date and time notation in the United States - Wikipedia

    en.wikipedia.org/wiki/Date_and_time_notation_in...

    Standard format: 1- or 2-digit day, the spelled-out month, and 4-digit year (e.g. 4 February 2023) Civilian format: spelled out month, 1-or 2-digit day, a comma, and the 4-digit year (e.g. February 4, 2023). [12] Date Time Group format, used most often in operation orders. This format uses DDHHMMZMONYY, with DD being the two-digit day, HHMM ...

  3. List of date formats by country - Wikipedia

    en.wikipedia.org/wiki/List_of_date_formats_by...

    National standard format is yyyy-mm-dd. [161] dd.mm.yyyy format is used in some places where it is required by EU regulations, for example for best-before dates on food [162] and on driver's licenses. d/m format is used casually, when the year is obvious from the context, and for date ranges, e.g. 28-31/8 for 28–31 August.

  4. Ordinal date - Wikipedia

    en.wikipedia.org/wiki/Ordinal_date

    Mission control center's board with time data, displaying coordinated universal time with ordinal date (without year) prepended, on October 22, 2013 (i.e.2013-295). An ordinal date is a calendar date typically consisting of a year and an ordinal number, ranging between 1 and 366 (starting on January 1), representing the multiples of a day, called day of the year or ordinal day number (also ...

  5. Time formatting and storage bugs - Wikipedia

    en.wikipedia.org/wiki/Time_formatting_and...

    This problem can be seen in the spreadsheet program Microsoft Excel as of 2023, which stores dates as the number of days since 31 December 1899 (day 1 is 1 January 1900) with a fictional leap day in 1900 if using the default 1900 date system. Alternatively, if using the 1904 date system, the date is stored as the number of days since 1 January ...

  6. Wikipedia : Overview of date formatting guidelines

    en.wikipedia.org/wiki/Wikipedia:Overview_of_date...

    Day–month–year (DMY) format—e.g., 12 January 2025 or 12 Jan 2025; Month–day–year (MDY) format—e.g., January 12, 2025 or Jan 12, 2025 ; Year–month–day (YMD) format—e.g., 2025-01-12 (also called the "all-numeric" format; used only where space is limited, such as in references and some tables and infoboxes, but not in article ...

  7. ISO 8601 - Wikipedia

    en.wikipedia.org/wiki/ISO_8601

    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]

  8. Template:Format date - Wikipedia

    en.wikipedia.org/wiki/Template:Format_date

    No description. Template parameters [Edit template data] Parameter Description Type Status Year 1 year The year to render in the date Example 1997 Auto value Number suggested Month 2 month The month to render in the date Example January Auto value String suggested Day 3 day The day of the month to format in the date Example 20 Auto value String suggested Hour (HH) 4 hour hh the hour to format ...

  9. ISO week date - Wikipedia

    en.wikipedia.org/wiki/ISO_week_date

    A precise date is specified by the ISO week-numbering year in the format YYYY, a week number in the format ww prefixed by the letter 'W', and the weekday number, a digit d from 1 through 7, beginning with Monday and ending with Sunday. For example, the Gregorian date Friday, 31 January 2025 corresponds to day number 5 in the week number 05 of ...