I would work so the Christians can get their holiday, and then they work on my holiday. But I think a religious holiday should not be a federal holiday, it is unnecessary since the majority of the country is Christian businesses would close and give it as a holiday anyway. Not that I would fight or be up in arms about it being a federal holiday, just technically it seems wrong. The great thing about working in a very diversified area is that the different religions cover for each other at work throughout the year, not just Christmas.
I don’t “celebrate” Christmas in my house (I am Jewish and an atheist) unless my husbands family happens to be visiting that time of the year, since they are Catholic we would make a special dinner Christmas Eve and open gifts, but usually I go to one of their homes for Christmas.
BUT, I love Christmas time, the lights, the songs, the nutcracker, all of it.