This little function computes the date of Easter Sunday for present year or specific years, using Oudin's algorithm. It works for the entire Julian calendar (starting 325 AD) and Gregorian calendar (after 1583 AD). An option allows to use the Western Orthodox Church calendar instead of the default Catholic Church.
Easter day is useful to calculate other Christian feasts, like Ash Wednesday (Easter - 46), Good Friday (Easter - 2), Ascension Thursday (Easter + 39), Pentecost (Easter + 49). The function might recognise most of the Christian days related to Easter.
Sunday 21 April 2019
Sunday 31 March 2024
>> computus ash
Wednesday 06 March 2019
Thursday 21 May 2020
Thursday 13 May 2021
Thursday 26 May 2022
See help for syntax, and details.
François Beauducel (2023). computus (https://github.com/beaudu/computus/releases/tag/v1.2), GitHub. Retrieved .
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See release notes for this release on GitHub: https://github.com/beaudu/computus/releases/tag/v1.2
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adds main Christian dates as input argument.