Have a very mild and toned down Christmas, it is after all a religious holiday.
Inviting people over for dinner or something to that effect is considered mild, without caroling ..bla bla bla
You be surprised on how many people are doing this now, the younger generation is taking on a much lesser approach to Christmas that in the past.
It might be that there is a greater percentage of people that are not involved in religion as a possibility.
I usually invite my JW brother and his wife out to dinner and a movie and a invitation usually follows by them.
The no worries about what to cook and all the fuss gets handed over to a restaurant.
We have an arrangement that we don't bring up religion, its worked for the past 30 years so why change it.