Christmas or Christmas Day is an annual festival commemorating the birth of Jesus Christ, observed generally on December 25 as a religious and cultural celebration among billions of people around the world. A feast central to the Christian liturgical year, it closes the Advent season and initiates the twelve days of Christmastide, which ends after the twelfth night. Christmas is a public holiday in many of the world's nations, is celebrated culturally by a large number of former or non-Christian people, and is an integral part of the Christmas and holiday season.
