 It also is associated with a period of shopping which comprises a peak season for the retail sector (the "Christmas (or holiday) shopping season") and a period of sales at the end of the season (the "January sales").Christmas window displays and Christmas tree lighting ceremonies when trees decorated with ornaments and light bulbs are illuminated are traditions in many areas.In the denominations of Western Christianity, the term "Christmas season" is considered synonymous with Christmastide, which runs from December 25 (Christmas Day) to January 5 (Twelfth Night or Epiphany Eve), popularly known as the 12 Days of Christmas.