Facts About East
Easter and the holidays that are related to it are moveable feasts, in that they do not fall on a fixed date in the Gregorian or Julian calendars (both of which follow the cycle of the sun and the seasons). Instead, the date for Easter is determined on a lunisolar calendar, as is the Hebrew calendar.
"Easter." Wikipedia, The Free Encyclopedia. 26 Feb 2009, 21:17 UTC. 27 Feb 2009 http://en.wikipedia.org/w/index.php?title=Easter&oldid=273504075.