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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.
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]
This date format is used in Kazakhstan, Latvia, Nepal, and Turkmenistan. According to the official rules of documenting dates by governmental authorities, [8] the long date format in Kazakh is written in the year–day–month order, e.g. 2006 5 April (Kazakh: 2006 жылғы 05 сәуір).
In communications messages, a date-time group (DTG) is a set of characters, usually in a prescribed format, used to express the year, the month, the day of the month, the hour of the day, the minute of the hour, and the time zone, if different from Coordinated Universal Time (UTC).
When using serial numbers for dates (e.g. in spreadsheets), doy is the serial number for a date minus the serial number for 31st December of the previous year, or alternatively minus the serial number for 1st January the same year plus one. Algorithm. Subtract the weekday number from the ordinal day of the year. Add 10. Divide by 7, discard the ...
Ongoing maintenance of date formats may one day be carried out by bots on articles already tagged with templates ({{use dmy dates}} or {{use mdy dates}}) which help to identify the correct format. Potentially ambiguous dates, using slashes or full stops (6/7/1961, 12/07/1986, 6.7.1961, 12.07.1986) are re-appearing on some thousands of pages ...
Ambiguities as to which calendar is used for the year are usually only resolved by the context in which the date appears, but imperial calendar dates may be prefixed with a single character or letter denoting the era, e.g. 令5/12/31 or R5/12/31. This is a shorthand notation and full dates are often the preferred way of resolving such ambiguities.
Wikipedia's guidelines for formatting dates (MOS:DATEFORMAT) set out the three date formats acceptable for use in Wikipedia articles, namely: . Day–month–year (DMY) format—e.g., 12 January 2025 or 12 Jan 2025;