Christmas commemorates the birth of Jesus Christ, who is regarded by Christians as God's son. Because there is little information regarding his early life, his birth date is uncertain. Scholars differ over the exact date of Jesus' birth. On December 25, Christians honor Jesus' birth. Many, but not all, countries observe Christmas Day as a national holiday. In the weeks running up to Christmas Day, many homes display Christmas trees and other decorations. Some companies throw Christmas parties before the 25th of December. Exchanging gifts, singing Christmas music, and attending parties are all examples of festive activities. It's a magical time of year when youngsters receive gifts from their families, friends, and Santa Claus, or Father Christmas. Prior to Christmas Day, Christmas cards are often presented or mailed out. Images of Santa Claus, sometimes known as Father Christmas, snowmen, reindeer, and candy canes can be found on Christmas cards, posters, signage, and other printed or marketing material. During Christmas Eve and Christmas Day, images of infant Jesus, the Christmas star, and other symbols associated with the religious meaning of Christmas are also seen. The markets glisten with strings of lights, stockings, tree toppers, glass balls, garlands and several other attractive goods. Some people keep Christmas to themselves, while others invite friends to a Christmas buffet or potluck lunch. Special services are held at churches, which may include a crèche or a miniature Nativity scene.