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  2. Xiaoman - Wikipedia

    en.wikipedia.org/wiki/Xiaoman

    The traditional Chinese calendar divides a year into 24 solar terms. [1] ... Date and Time Year Begin End 辛巳 ... 2020-05-20 13:49 2020-06-05 04:58

  3. 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.

  4. 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 ...

  5. Xiaoshu - Wikipedia

    en.wikipedia.org/wiki/Xiaoshu

    1 Date and time. 2 References. ... is the 11th solar term, in the traditional chinese lunisolar calendar which divides a year into 24 ones. ... 2020-07-06 15:14 2020 ...

  6. Astronomical Almanac - Wikipedia

    en.wikipedia.org/wiki/Astronomical_Almanac

    The material appears in sections, each section addressing a specific astronomical category. The book also includes references to the material, explanations, and examples. It used to be available up to one year in advance of its date, however the current 2024 edition became available only one month in advance; in December 2023.

  7. The Nautical Almanac - Wikipedia

    en.wikipedia.org/wiki/The_Nautical_Almanac

    Time: A major change introduced with the 1960 issue of The Astronomical Ephemeris was the use of ephemeris time in place of mean solar time for the major ephemeris tabulations. [12] But the Nautical Almanac, now continuing as a separate publication addressed largely to navigators, continued to give tabulations based on mean solar time (UT).

  8. Astronomical year numbering - Wikipedia

    en.wikipedia.org/wiki/Astronomical_year_numbering

    Fred Espenak of NASA lists 50 phases of the Moon within year 0, showing that it is a full year, not an instant in time. [4] Jean Meeus gives the following explanation: [11] There is a disagreement between astronomers and historians about how to count the years preceding year 1. In [Astronomical Algorithms], the 'B.C.' years are counted ...

  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.