Ayn Rand, the mother of American libertarianism and very outspoken atheist said it's OK to enjoy Christmas ~
"The charming aspect of Christmas is the fact that it expresses good will in a cheerful, happy, benevolent, non-sacrificial way. One says "Merry Christmas" - not "Weep and Repent." And the good will is expressed in a material earthly form - by giving presents to one's friends, or by sending them cards in token of remembrance." ~ Ayn Rand
If Ayn says it's OK, Fred is in total agreement and says go for it, eat, smile, feel good, do nice things for people, make plans for the new year, enjoy shopping and, if you feel the need, gather with friends in a church. I won't mind, it's a grand and free country - hell, if you've got some good eats at the church, I just might stop by!
Oh, by the way, I am definitely in favor of material earthly things and electronic tokens of remembrance which I'm hereby sending ...