Everyone cares about a vacation from work. Show me Christmas in the bible? It's not there is it, but decorating trees with gold is certainly in the bible, in a negative sense.
There seems to be gaps in your Christian theology.
Christmas is the English term that we give to the birth of Our Lord. It is significant because it was the start of the life of Our Lord as a human being here on Earth, which led to the Crucifixion and Resurrection. If you like, I can refer you to the Vatican web site for a complete Christian education.
Have you too benefited from an American public school education?