Christmas is a pagan holiday co-opted by Christians. Christmas is most definitely a secular tradition in the US and there is nothing unusual about an atheist celebrating it.

What is unusual is Christians trying to bring Christ into the celebration when the timing just doesn’t make any sense. Was he actually born during this time? Where does he fit in with Santa Claus? Why do we bring a tree indoors? What about Jesus equals buying gifts to give to loved ones?

Clearly Jesus doesn’t belong in Christmas no matter how hard Christians try to pretend he does.