Easter always occurs on the first Sunday after the Paschal Full Moon (the first full moon that occurs after the vernal equinox, which signifies the beginning of spring in the northern hemisphere), according to The Old Farmers Almanac.
Who decided when Easter should be celebrated?
the Council of Nicaea At the end of the 2nd century, some congregations celebrated Easter on the day of the Passover, while others celebrated it on the following Sunday. In 325 CE, the Council of Nicaea established that Easter would be held on the first Sunday after the first Full Moon occurring on or after the vernal equinox.
Are there two Easters?
Easter continues to be celebrated on two different dates depending on which church you belong to. The Orthodox Easter now falls anywhere between April 4 and May 8 and the Catholic Easter falls anywhere between March 22 and April 25. In rare instances, the dates align, and Easter is celebrated simultaneously.