At Easter, Christians celebrate their belief that Jesus came back to life after his death (called "resurrection").
Easter, the principal festival of the Christian
church year, celebrates the Resurrection of Jesus Christ on the third day after
his Crucifixion. The origins of Easter date to the beginnings of
Christianity, and it is probably the oldest Christian observance after the
Sabbath (originally observed on Saturday, later on Sunday). Later, the Sabbath
subsequently came to be regarded as the weekly celebration of the Resurrection.