The Christmas season or the festive season, also known as the holiday season or the holidays, is an annual period generally spanning from November or December to early January incorporating Christmas Day and New Year's Day. The gift-giving associated with the season creates a peak season for the retail sector extending to the end of the period ("January sales"). Christmas window displays and Christmas tree lighting ceremonies are customary traditions in various locales.
In Western Christianity, the Christmas season is traditionally 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. Christmas in Italy is one of the country's major holidays and begins on 8 December, with the Feast of the Immaculate Conception, the day on which traditionally the Christmas tree is mounted and ends on 6 January, of the following year with the Epiphany. As the economic impact involving the anticipatory lead-up to Christmas Day grew in America and Europe into the 19th and 20th centuries, the term "Christmas season" began to also encompass the liturgical Advent season, the period of preparation observed in Western Christianity from the fourth Sunday before Christmas Day until the night of Christmas Eve. The term "Advent calendar" continues to be widely known in Western parlance as a term referring to a countdown to Christmas Day from the beginning of December.