Well, frankly that's up to you!
Far from the grumpy and miserable sentiments sometimes attributed to atheists at this time of year, we see AAI's members happily celebrating with family and friends.
"It's simple, we celebrate Santa Claus!”
"Open presents, eat, visit family -
what humans have been doing for thousands of years to celebrate the
return of longer days!”
"Isaac Newton, the founder of western
civilization, was born Dec 25, 1642. At our house we celebrate
"Newtonmass" on Dec 25. In the morning we do optics experiments, in the
afternoon we do differentials and integrals, and in the evening we scoff
at alchemy and biblical chronology. It makes for an interesting day."
Whatever you do or don't do to celebrate the holiday season let us know at info [at] atheistalliance [dot] org!