Christmas season

noun4

1. •
   The period at the end of the year when retailers promote Christmas shopping opportunities
2. •
   (US, informal) The winter season starting around Thanksgiving (typically Black Friday) and ending at or about New Year's Eve.
3. •
   Christmastide, Yuletide; the Twelve Days of Christmas, starting on Christmas Day and ending on Epiphany, January 6.
4. •
   Advent, the period from Advent Sunday (inclusive) through the start of Epiphany.