Easter

Easter is the most important religious holiday of the Christian liturgical year, observed in March, April, or May to celebrate the resurrection of Jesus, which Christians believe occurred after his death by crucifixion in AD 27-33 (see Good Friday). Easter can also refer to the season of the church year, lasting for fifty days, which follows this holiday and ends at Pentecost. Easter Day is also called the Sunday of the Resurrection.

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.
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.