Most people know that the simple meaning of Christmas is to celebrate the birth of Jesus Christ, the son of God in the Christian religion. The word Christmas originated from an old English phrase, "Cristes Masse", meaningthe mass of Christ（基督弥撒）. The date, December 25, was established by Bishop Liberius of Rome in 354 AD. He selected the date to mark the official time for celebrating Christ's birth. Before then, the birth of Jesus was observed on different days and even to this day no one is certain the exact date of Christ's birth.
