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easter_mjd(+Year, ?MJD)
Calculate Easter Sunday date for a given year
- Year
- Integer
- MJD
- Variable or integer
Examples
    ?- easter_mjd(2020, MJD), mjd_to_ymd(MJD, YMD).
    MJD = 58951
    YMD = 2020 - 4 - 12
    Yes (0.00s cpu)