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Used for formatting ranges of dates. Can accept an unlimited number of start/end pairs. It will automatically truncate the end date to the last two digits if the rest of the digits match. If the end date is missing, the range will be presented with just the start date (or you can set the end date to "present").
(Several forms of piped links override the date-formatting function.) Links to date ranges in the same calendar month, such as "[[December 13–17]]" or "the night of [[30/31 May]]" cause autoformatting to fail. The autoformatting mechanism will output such dates in a damaged form: 30/May 31, etc.
ISO 8601-1:2019 allows the T to be omitted in the extended format, as in "13:47:30", but only allows the T to be omitted in the basic format when there is no risk of confusion with date expressions. Either the seconds, or the minutes and seconds, may be omitted from the basic or extended time formats for greater brevity but decreased precision ...
For ranges, if "to present" or "–present" is used, the current year (or, in cases where necessary, date) of "present" at the time of writing should be included. Thus 1982–present (as of 2025) – if writing in 2025 – is preferable to 1982–present. If the "from" date has an internal space, a spaced en dash is used.
ISO 8601 is an international standard for communicating certain information, in particular between computer systems. The information comprises certain units of time which would normally be called "dates and times" from millennia (and with extensions larger units) down to seconds and decimal fractions thereof (for example 12:34 on 10 April 1962), and other time-like entities which we need not ...
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.
Many computer systems measure time and date using Unix time, an international standard for digital timekeeping. Unix time is defined as the number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (an arbitrarily chosen time based on the creation of the first Unix system ), which has been dubbed the Unix epoch .
The last modification date stamp (and with DELWATCH 2.0+ also the file deletion date stamp, and since DOS 7.0+ optionally also the last access date stamp and creation date stamp), are stored in the directory entry with the year represented as an unsigned seven bit number (0–127), relative to 1980, and thereby unable to indicate any dates in ...