Calculate Ancient (Proleptic) Dates of Orthodox Easter by Julian Day Numbers

Most calculation routines to determine date of Orthodox Easter work only for dates later than 1900. Here is a universal calculation method, validated by Easter dates of 30 AD and 33AD. The Gauss Method is given to verify the Julian Day Number method.

Most calculation routines to determine date of Orthodox Easter work only for dates later than 1900. Here is a universal calculation method, validated by Easter dates of 30 AD and 33AD. The Gauss Method is given to verify the Julian Day Number method. Less