The document summarizes how Christmas is celebrated in various countries around the world. In Germany, houses are decorated and Advent calendars are used. Children leave letters for Christkind and presents are opened on Christmas Eve. In Italy, a nativity scene called a presepe is traditionally set up and presents are believed to be delivered by Jesus. In Mexico, Las Posadas celebrations reenact Mary and Joseph's journey to Bethlehem for nine days leading up to Christmas.