My parents became JW's when I was 4 years old, and I left it when I was 50! That's a long time without holidays. One by one, our 4 children left the religion too, and they had families, and didn't want to deprive their children of the good times, or subject them to the isolation at school of not celebrating.
So after a year or two, we joined in and love it! We do Christmas very big, and most years I only buy gifts for the grandchildren (9 of them now) and a friend or two. I love the tree, decorating it, and looking at it. Lights on the house, baking, the smells, and the energy at the Malls. I truly see now that giving is better than receiving. It is so much fun and feels so good.
For us, it's not about Jesus' birth.........he was just a man in our opinion, so it's all about Santa Claus and snowmen, gingerbread people and reindeer. Love it, love it.
It takes time to deprogram all the years of "you have to look at the pagan origins" until you realize one day that that is just crap.