Easter is a religious holiday, which is celebrated once a year. This is a holiday that Christians celebrate. On this holiday, the Resurrection of Jesus Christ is celebrated, which is why some call it Resurrection Sunday. The Resurrection is when Jesus rose from the dead after his crucifixion, in which he died for the sins of his people.
The New Testament of the Bible cites Easter as a foundation celebration of Christianity. There are several ways the holiday is celebrated. Many churches hold special services for the holiday, with sermons about the death of Jesus. Another way it is celebrated is with Easter egg hunts and dinners.