The celebration of Christmas Day commemorates Jesus' birth. In preparation for Christmas Day, Christmas Eve is celebrated worldwide as a full or partial holiday. The holiday is also marked by the arrival of Santa Clause in his sleigh to deliver Christmas gifts around the world. Both religious and nonreligious traditions are celebrated on Christmas Eve. Christian traditions are centered around Jesus' birth.Each denomination has its own customs.    

Christmas Eve is the evening or entire day before Christmas Day celebrated on December 24th.

The evening before Christmas Day was usually devoted to decorating and preparing, an influence of winter solstice celebrations in the 16th century.