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  2. World Calendar - Wikipedia

    en.wikipedia.org/wiki/World_Calendar

    The World Calendar is a proposed reform of the Gregorian calendar created by Elisabeth Achelis of Brooklyn, ... Kansas who died on 29 May 2020. [7] Reception

  3. 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 ...

  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

    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 ... JPL Horizons On-Line Ephemeris System ...

  6. Conversion between Julian and Gregorian calendars - Wikipedia

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

    The tables below list equivalent dates in the Julian and Gregorian calendars. Years are given in astronomical year numbering . This is a visual example of the official date change from the Julian calendar to the Gregorian

  7. Category:Calendars - Wikipedia

    en.wikipedia.org/wiki/Category:Calendars

    Pages in category "Calendars" ... This page was last edited on 30 April 2020, ... additional terms may apply. By using this site, ...

  8. Tropical year - Wikipedia

    en.wikipedia.org/wiki/Tropical_year

    The mean tropical year in 2000 was 365.24219 ephemeris days, each ephemeris day lasting 86,400 SI seconds. [3] This is 365.24217 mean solar days . [ 4 ] For this reason, the calendar year is an approximation of the solar year: the Gregorian calendar (with its rules for catch-up leap days ) is designed so as to resynchronise the calendar year ...

  9. Category:May 2020 events - Wikipedia

    en.wikipedia.org/wiki/Category:May_2020_events

    Pages in category "May 2020 events" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. D. Deaths in May 2020; N.