My family celebrates Christmas but not as a religious festival. We celebrate the solstice which was the original festival before it was usurped by the Christians and renamed.
Unfortunately the Christians fiddled with the calandar and it is out by a couple of days. I would happliy see it moved back to the actual solstice.
And before you ask, as for the name, we still call it Christmas.
Most atheists would happily stop using that name too, just as soon as the Christians stop using the name of the ancient joyful Northern Spring fertility festival for their macabre celebration of Christ's brutal execution.
The word "Easter" comes from the same roots as estreus (and its many spelling variations in different languages), meaning fertility and has absolutely nothing whatsoever to do with Christ.
So next time you hear someone talking about "the true meaning" of these festivals please remind them of the facts.