Latin Genitive DeclinerMake a name into the Latin genitive case. Note: This does not work for irregular names.
THE FIVE DECLENSIONS.
18. There are five Declensions in Latin, distinguished from each other by the final letter of the Stem, and also by the Termination of the Genitive Singular, as follows:—
Date of EasterFind the date of Easter for a particular year.
First Full Moon After Equinox:
Algorithm from Astronomical Algorithms by Jean Meeus of the University of Louvain (Leuven)
For transcriptions of the original texts of the Easter algorithm by Clavius, S.J., see: Les textes fondateurs du calendrier grégorien § Les canons.
This algorithm is valid for all dates after the institution of the Gregorian calendar, 1583. Easter is defined as the first Sunday after the first full moon after the vernal equinox. The equinox is fixed for ecclesiastical purposes on March 21, and the full moon does not correspond exactly to the astronomical full moon. Cf., e.g., Easter in 2038; the astronomical rule does not hold.
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