Easter dating table
Although modified slightly from its original form, by 1583 A. the table for determining the Ecclesiastical Full Moon dates was permanently established and has been used ever since to determine the date of Easter.
Thus, according to the Ecclesiastical tables, the Paschal Full Moon is the first Ecclesiastical Full Moon date after March 20 (which happened to be the vernal equinox date in 325 A. Thus, in Western Christianity, Easter is always celebrated on the Sunday immediately following the Paschal Full Moon.
As astronomers were able to approximate the dates of all the full moons in future years, the Western Christian Church used these calculations to establish a table of Ecclesiastical Full Moon dates.
These dates would determine all of the Holy Days on the Ecclesiastical calendar.
D., Easter was celebrated on the Sunday immediately following the first full moon after the vernal (spring) equinox. D., at the Council of Nicaea, the Western Church resolved to establish a more standardized system for determining the date of Easter.
Have you ever wondered why Easter Sunday can fall anywhere between March 22 and April 25?
And why Eastern Orthodox churches usually celebrate Easter on a different day than Western churches?
The date of the Paschal Full Moon is determined from historical tables.
The date of Easter no longer directly corresponds to lunar events.
At the heart of the matter lies a simple explanation. The earliest believers in the church of Asia Minor wished to keep the observance of Easter correlated to the Jewish Passover.