Depends what you mean by celebrating. We use Christmas as a time of year to meet up with friends and family as it is one of the only times in the year when we have free time together. No religious element to it.

Most of the family is still religious, so I'm exchanging gifts and pleasantries and all the things that happy families do when reunited regardless of the cause. I still look at it as a "holiday" in the colloquial sense. I just deal quietly with the religious symbolism and such for the sake of the family.

Working... rather pleased it is Xmas double time for nurses woo hoo

Other than a minor gift exchange with my father and a little family visit, no real celebration.

Not celebrating, but will have visitors for the next week, we don't do xmas.