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  2. Year 1900 problem - Wikipedia

    en.wikipedia.org/wiki/Year_1900_problem

    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 ...

  3. Time formatting and storage bugs - Wikipedia

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

    On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating system for DEC PDP-10 computers overflowed, in a bug known as "DATE75". The field value was calculated by taking the number of years since 1964, multiplying by 12, adding the number of months since January, multiplying by 31, and adding the number of days since the start of the month; putting 2 12 − 1 ...

  4. Microsoft Office 2010 - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Office_2010

    Microsoft Office 2010 (codenamed Office 14 [6]) is a version of Microsoft Office for Microsoft Windows unveiled by Microsoft on May 15, 2009, and released to manufacturing on April 15, 2010, [1] with general availability on June 15, 2010. [7]

  5. Help:Conditional expressions - Wikipedia

    en.wikipedia.org/wiki/Help:Conditional_expressions

    To make comparisons based on dates (e.g., if the current date and time is after some other date and time), first convert the time(s) to the number of seconds after January 1, 1970, using the function {{#time: U }}, then compare (or add, subtract, etc.) those numerical values.

  6. List of date formats by country - Wikipedia

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

    All examples use example date 2021-03-31 / 2021 March 31 / 31 March 2021 / March 31, 2021 – except where a single-digit day is illustrated. Basic components of a calendar date for the most common calendar systems: D – day; M – month; Y – year; Specific formats for the basic components: yy – two-digit year, e.g. 24; yyyy – four-digit ...

  7. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS.It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).

  8. Wikipedia:Manual of Style/Dates and numbers/Date ...

    en.wikipedia.org/.../Date_autoformatting

    (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.

  9. Wikipedia : Overview of date formatting guidelines

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

    Think carefully before changing established date formats of existing articles, especially multiple articles in a particular subject area. Consider whether the proposed change would improve Wikipedia (beyond conforming the articles to your personal preference) and whether editors who have contributed to the article(s) may have reached a consensus to use a particular format.