I don't celebrate holidays of beliefs I don't hold as truth. But I've no issue with someone else enjoying theirs. I'm not a Grinch. Keep your Christmas. Enjoy it in good health.
But to reduce my personal exposure to the overwhelming commercialization and exportation of it, beginning in November and increasingly from there, I avoid watching television (thank you internet/youtube for filling in that technogap) such that by late December I don't even turn my car radio on anymore, utilizing only the CD player.
Most stores are easy for me to avoid as I don't like shopping anyway. For food shopping I know just want I want before I enter the store and know where everything is so my exposure to xmas muzak is limited.
Yesterday I had to listen to some while shopping for a few bags of concrete at homodepot for a garden project. While. shopping. for. bags. of. concrete. Maybe this year I should buy myself some xmas ear buds for next season.
When mom was alive, I did used to take her out on xmas eve for a car tour of all the xmas lights with a dinner break for Chinese food, naturally, or whatever restaurant we ran into still open.
I sometimes fantasize relocating to a Buddhist country like Thailand where I like to imagine less Xmas would be thrown into everyone's face.