Christmas is an annual holiday that celebrates the birth of Jesus. Christmas festivities often combine the commemoration of Jesus' birth with various secular customs, many of which have been influenced by earlier winter festivals. There are a number of traditions associated with the occassion. Modern traditions have come to include the display of Nativity scenes, Holly and Christmas trees, the exchange of gifts and cards, and the arrival of Father Christmas or Santa Claus on Christmas Eve or Christmas morning. The last one mentioned is a highly popular tradition that has its origin in times long ago.