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Microsoft Excel (using the default 1900 Date System) cannot display dates before the year 1900, although this is not due to a two-digit integer being used to represent the year: Excel uses a floating-point number to store dates and times. The number 1.0 represents the first second of January 1, 1900, in the 1900 Date System (or January 2, 1904 ...
Note that all parameters default to the current date, so for example, the second set of parameters can be left out to calculate elapsed time since a past date: {{Age in years, months, weeks and days |month1 = 1 |day1 = 1 |year1 = 1 }} → 2023 years, 11 months, 2 weeks and 6 days
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.
Additionally, days from some recent years (currently: 2003–2005) have an article with a title in the format "<Month> <day number>, <year>", e.g. February 27, 2003 – these articles on a specific day of a specific year can be reached from the "<Month> <day number>" articles via the {{This date in recent years}} template. An example of this ...
The preference settings that a registered user can choose are displayed in the second row. The year and the day-month combination are wikilinked separately, except for dates in the ISO 8601 format. Full date formats not found in the first column are not autoformatted when wikilinked, and are likely to produce a redlink; for instance,
Period is a duration (has an extra day to include the end date). format=commas: Numbers over 999 are formatted with commas. format=raw: Use a hyphen (-) to indicate a negative date difference instead of a minus (−); a hyphen may allow the result to be used in a calculation. sep=comma: Separator between items is a comma: 1 year, 2 months, 3 days.
The link targets are independent of the user-specified date format. The year has no leading zeros, e.g. "2007", "7", "7 BC". ... in the case of month numbers the year ...
Up until the 2007 version, Microsoft Excel used a proprietary binary file format called Excel Binary File Format (.XLS) as its primary format. [30] Excel 2007 uses Office Open XML as its primary file format, an XML-based format that followed after a previous XML -based format called "XML Spreadsheet" ("XMLSS"), first introduced in Excel 2002.