Although a Christian holiday, Christmas is widely celebrated by many non-Christians,and some of its popular celebratory customs have pre-Christian or secular themes and origins. Popular modern customs of the holiday include gift-giving, music, an exchange of greeting cards, church celebrations, a special meal, and the display of various decorations; including Christmas trees, lights, and garlands, mistletoe, nativity scenes, and holly. In addition, Father Christmas (known as Santa Claus in some areas, including North America, Australia and Ireland) is a popular mythological figure in many countries, associated with the bringing of gifts for children.