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  2. Time formatting and storage bugs - Wikipedia

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

    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 ...

  3. 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 ...

  4. Year 2000 problem - Wikipedia

    en.wikipedia.org/wiki/Year_2000_problem

    Y2K is a numeronym and was the common abbreviation for the year 2000 software problem. The abbreviation combines the letter Y for "year", the number 2 and a capitalized version of k for the SI unit prefix kilo meaning 1000; hence, 2K signifies 2000.

  5. 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]

  6. Wikipedia:Manual of Style/Dates and numbers - Wikipedia

    en.wikipedia.org/.../Dates_and_numbers

    2 BC, 1 BC, 1 AD, 2 AD ...; there is no "year zero". Treat the 1st century AD as years 1100, the 17th century as 1601–1700, and the second millennium as 1001–2000; similarly, the 1st century BC / BCE was 1001 BC / BCE, the 17th century BC / BCE was 1700–1601 BC / BCE, and the second millennium 2000–1001 BC / BCE.

  7. Year 2038 problem - Wikipedia

    en.wikipedia.org/wiki/Year_2038_problem

    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.

  8. Patch Tuesday - Wikipedia

    en.wikipedia.org/wiki/Patch_Tuesday

    Patch Tuesday [1] (also known as Update Tuesday [1] [2]) is an unofficial term used to refer to when Microsoft, Adobe, Oracle and others regularly release software patches for their software products. [3] It is widely referred to in this way by the industry. [4] [5] [6] Microsoft formalized Patch Tuesday in October 2003.

  9. Leap second - Wikipedia

    en.wikipedia.org/wiki/Leap_second

    A negative leap second would suppress second 23:59:59 of the last day of a chosen month so that second 23:59:58 of that date would be followed immediately by second 00:00:00 of the following date. Since the introduction of leap seconds, the mean solar day has outpaced atomic time only for very brief periods and has not triggered a negative leap ...