Because christ means jesus and it's jesus's birthday, and mas means birthday,and instead of saying christ mas we put it together into one word, called Christmas
Russians call Christmas рождество or rozhdestvo.
they call it Christmas Day!
Japanese people call Christmas, Kurisumasu.
Christmas
Christmas
Christmas
The people of Great Britain call it Christmas.
Canadians that celebrate Christmas call it Christmas if they speak English and Noel if they speak French.
Those English speaking Britains call it Christmas.
A Christmas Tree LOL
Its still called Christmas
christmas i think