Module calendrica-ecclesiastical

Ecclesiastical Easter and related holiday calculations.

Ported from “Calendrical Calculations” (4th edition) by Nachum Dershowitz and Edward M. Reingold. Original Lisp code (CALENDRICA 4.0) is Apache 2.0 licensed.

Info:

  • Release: 0.2 2026-09-21

Functions

orthodox_easter (g_year) Fixed date of Orthodox Easter in Gregorian year g_year.
easter (g_year) Fixed date of Easter in Gregorian year g_year.
pentecost (g_year) Fixed date of Pentecost in Gregorian year g_year (49 days after Easter).


Functions

orthodox_easter (g_year)
Fixed date of Orthodox Easter in Gregorian year g_year.

Parameters:

  • g_year number Gregorian year.

Returns:

    number Fixed date.
easter (g_year)
Fixed date of Easter in Gregorian year g_year.

Parameters:

  • g_year number Gregorian year.

Returns:

    number Fixed date.
pentecost (g_year)
Fixed date of Pentecost in Gregorian year g_year (49 days after Easter).

Parameters:

  • g_year number Gregorian year.

Returns:

    number Fixed date.
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