What determines whether Easter is in March or April?
Passover. Easter is calculated to follow the Jewish feast of Passover. In 2008, Easter will be on Sunday, March 23. Catholics and most Protestants use the new Gregorian calendar decreed by Pope Gregory XIII in 1582 to calculate the date of Easter. The Greek Orthodox Church uses the old Julian calendar introduced in 46 B.C.E. by Julius Caesar. For more information, see: Catholic: http://en.wikipedia.org/wiki/Gregorian_c… http://aa.usno.navy.mil/faq/docs/easter…. Greek Orthodox: http://en.wikipedia.org/wiki/Julian_cale… http://www.smart.net/~mmontes/OrthEasttb… Catholic: The time of Easter is based on the cycles of the moon, the equinox, and seasons and things in nature. In simple (?)