This is the holiest day for Christians. It celebrates the resurrection of Jesus after he was crucified and died in Jerusalem. It is Jesus' suffering and death on the cross, often referred to as the "passion," followed by his resurrection that is central to Christian faith. Easter culminates the penitential period that starts with Ash Wednesday. Palm Sunday, which marks the entrance of Jesus into Jerusalem, occurs one week before Easter. Easter is a joyous holiday, since it marks for Christians the fulfillment of the Biblical prophecy of the coming of the Messiah. In addition to its religious significance, Easter is also celebrated as a spring holiday with themes of rebirth, gathering together with family and friends, and sharing special foods. Jehovah's Witnesses do not celebrate this holiday.