ˌChristmas ˈDay BrE AmE noun [uncountable]
December 25th, the day when most Christians celebrate the birth of Christ:
I always spend Christmas Day with my family.
ˌChristmas ˈDay BrE AmE noun [uncountable]
December 25th, the day when most Christians celebrate the birth of Christ:
I always spend Christmas Day with my family.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012