*in the year 325, the Council of Nic้e determined a date fo Easter. Full Moon would fall the 14th day of a "moon month". Easter would be marked by the dominical letter and the epactus.
**With the establishment of the equinox ne variatur on March 21, algorithms where elaborated to attribuate a date for Easter whatever the year. ***Time between two consecutive new moons: 20 days 12 hours 44 minutes 2.8 - Gives a letter code for the year's calendar Age of the moon on January 1st, minus one unity, 0 being the new moon's age.
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