The Christmas season[2] or the festive season;[3] also known as the holiday season or the holidays, is an annual period generally spanning from late November to early January. Incorporating Christmas Day and New Year's Day, the various celebrations during this time create a peak season for the retail sector (Christmas/holiday "shopping season") 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,[4][5] which runs from December 25 (Christmas Day) to January 5 (Twelfth Night or Epiphany Eve), popularly known as the 12 Days of Christmas.[6][4] 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,[7] the period observed in Western Christianity from the fourth Sunday before Christmas Day until 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 (although in retail planning the countdown to Christmas usually begins at the end of the summer season, and the beginning of September).
Beginning in the mid-20th century, as the Christian-associated Christmas holiday and liturgical season, in some circles, became increasingly commercialized and central to American economics and culture while religio-multicultural sensitivity rose, generic references to the season that omitted the word "Christmas" became more common in the corporate and public sphere of the United States,[8] which has caused a semantics controversy[9] that continues to the present. By the late 20th century, the Jewish holiday of Hanukkah and the new African American cultural holiday of Kwanzaa began to be considered in the U.S. as being part of the "holiday season", a term that as of 2013 had become equally or more prevalent than "Christmas season" in U.S. sources to refer to the end-of-the-year festive period.[8][10][11] "Holiday season" has also spread in varying degrees to Canada;[12] however, in the United Kingdom and Ireland, the phrase "holiday season" has been the subject of some controversy.[13]
The winter solstice may have been a special moment of the annual cycle for some cultures even during Neolithic times. This is attested by physical remains in the layouts of late Neolithic and Bronze Age archaeological sites, such as Stonehenge in England and Newgrange in Ireland. The primary axes of both of these monuments seem to have been carefully aligned on a sight-line pointing to the winter solstice sunrise (Newgrange) and the winter solstice sunset (Stonehenge). It is significant that the Great Trilithon was oriented outwards from the middle of the monument, i.e. its smooth flat face was turned towards the midwinter Sun.[14]
Saturnalia was an ancient Roman festival in honor of the deity Saturn, the god of time, held on December 17 of the Julian calendar and later expanded with festivities through December 23. The holiday was celebrated with a sacrifice at the Temple of Saturn, in the Roman Forum, and a public banquet, followed by private gift-giving, continual partying, and a carnival atmosphere that overturned Roman social norms: gambling was permitted, and masters provided table service for their slaves.[15] The poet Catullus called it "the best of days."[16]