Christmas characters and food, Christmas-linked holidays and music, Santa Claus and traditions. Related to Annunciation, Incarnation; Crucifixion; Advent, the four weeks preceding Christmas; and the period between the day after Thanksgiving and the Sunday after New Year”s Day, the American holiday season. Christmas or Christmas Day is a holiday celebrating the birth of Jesus, the central figure of Christianity. Aspects of celebration may include gift-giving, Christmas trees, display of Nativity sets, church attendance, the Father Christmas/Santa Claus myth, and family gatherings. Users of the Gregorian calendar observe the holiday on December 25. Some Eastern Orthodox Churches celebrate on December 25 by the Julian calendar, which currently corresponds to January 7 on the Gregorian calendar. These dates are merely traditional; the great majority of scholars agree that the actual birthdate of Jesus is unknown. In Western culture, the holiday is characterized by the exchange of gifts among friends and family members, some of the gifts being attributed to Santa Claus (also known as Father Christmas, Saint Nicholas, Saint Basil and Father Frost). However, various local and regional Christmas traditions are still practiced, despite the widespread influence of American, British and Australian Christmas motifs disseminated by film, popular literature, television, and other media.