New Year’s. Fourth of July. Thanksgiving. Christmas. These are all major national holidays, but which is unlike the others?

Take a closer look, and you’ll find that of these — and of all 10 public holidays established by U.S. fFederal law — Christmas is the only one with religious significance.

“The problem with writing about religion is that you run the risk of offending sincerely religious people, and then they come after you with machetes.”

-Dave Barry