I'm an aethist and DH is agnositic, but we still celebrate Christmas. We don't look at the religious side of it, we think of it as a time to celebrate being with family. It the one time of year we try to get all our family together and enjoy each others company, plus we love the the lights and decorations, all the good food, and watching the kids excitedly rip open presents from Santa and loved ones. It's a very nostaligic time of year too and bring back lots of happy childhood memories. I love Christmas even though I'm not religious.