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  2. List of non-standard dates - Wikipedia

    en.wikipedia.org/wiki/List_of_non-standard_dates

    January 0 is the day before January 1 in an annual ephemeris. It keeps the date in the year for which the ephemeris was published, thus avoiding any reference to the previous year, even though it is the same day as December 31 of the previous year. January 0 also occurs in the epoch for the ephemeris second, "1900 January 0 at 12 hours ...

  3. Template:Sidereal and tropical zodiac dates - Wikipedia

    en.wikipedia.org/wiki/Template:Sidereal_and...

    Dates based on 14 equal length sign zodiac used by Schmidt [5] [i] Based on IAU boundaries [6] Aries: Mar 21 – Apr 19: April 14 – May 14: April 16 – May 11: Apr 18 – May 13 Cetus [i] — — May 12 – June 6 [i] — [dubious – discuss] Taurus: Apr 20 – May 20: May 15 – Jun 15: June 7 – July 2: May 13 – Jun 21 Gemini: May 21 ...

  4. Category:May 2020 in the United States - Wikipedia

    en.wikipedia.org/wiki/Category:May_2020_in_the...

    Pages in category "May 2020 in the United States" The following 35 pages are in this category, out of 35 total. This list may not reflect recent changes. 0–9.

  5. Xiaoman - Wikipedia

    en.wikipedia.org/wiki/Xiaoman

    Dates Lichun: 315° 4–5 February ... In the Gregorian calendar, it usually begins around 21 May and ends around 5 June ... 2020-05-20 13:49 2020-06-05 04:58

  6. Conversion between Julian and Gregorian calendars - Wikipedia

    en.wikipedia.org/wiki/Conversion_between_Julian...

    No guidance is provided about conversion of dates before March 5, -500, or after February 29, 2100 (both being Julian dates). For unlisted dates, find the date in the table closest to, but earlier than, the date to be converted. Be sure to use the correct column. If converting from Julian to Gregorian, add the number from the "Difference" column.

  7. Astronomical year numbering - Wikipedia

    en.wikipedia.org/wiki/Astronomical_year_numbering

    Version 1.0 of the XML Schema language, often used to describe data interchanged between computers in XML, includes built-in primitive datatypes date and dateTime. Although these are defined in terms of ISO 8601 which uses the proleptic Gregorian calendar and therefore should include a year 0, the XML Schema specification states that there is ...

  8. Mark your 2025 calendar with dates for holidays, events and games

    www.aol.com/news/mark-2025-calendar-dates...

    Check out the 2025 calendar dates for holidays, big games, movie releases, award shows and more. ... May 6 (preliminary date from NASA)May full moon reaches peak illumination - Monday, May 12June ...

  9. World Calendar - Wikipedia

    en.wikipedia.org/wiki/World_Calendar

    The World Calendar is a 12-month, perennial calendar with equal quarters. [1]Each quarter begins on a Sunday and ends on a Saturday. The quarters are equal: each has exactly 91 days, 13 weeks, or 3 months.