Date of Easter
In Western Christianity, Easter always falls on a Sunday from March 22 to April 25 inclusive. The following day, Easter Monday, is a legal holiday in many countries with predominantly Christian traditions. In Eastern Christianity, Easter falls between April 4 and May 8 between 1900 and 2100 based on the Gregorian date.
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 (which follow the motion of the sun and the seasons). Instead, they are based on a lunar calendar similar—but not identical—to the Hebrew Calendar. The precise date of Easter has often been a matter for contention.