Another name for a christmas song is a Christmas carol.
Christmas
Victorian Christmas
You may be referring to a "Christmas play" or a "Christmas pageant".
Noel
At Christmas Time
O Christmas Tree
Because Charles Dickens book a Christmas Carol won the American's over and they voted to make Christmas a holiday. Christmas is another name for Saturnalia.
Yule is another word for Christmas time. Yule-Tide Carols, or the Yule Log... etc
The name of the episode is Big Time Christmas
Guster ~ Tiny Tree Christmas
Tiny Tree Christmas - Guster (awesome band)