A perennial question, esp. among Christians who want to be as fundamental as possible. If Jesus were alive today, would he approve of celebrating Christmas? Anyways, my humble opinion (if anyone wants it), is he would say simply this. It all depends on the way you celebrate the holiday. It matters only what is in your heart, in other words. You can celebrate it selfishly and by drinking and eating too much. Or it can be a somber, loving time, with families, and by helping people. Do you (speaking to my fundamentalist friends now) honestly when you get to the pearly gates, St. Peter is going to take out a big rule book, and say "Let's see, the 10th chapter of the Book of Leviticus says..." and so forth? NO! He will judge you by the love in your heart--just like Jesus said (hence WWJD)! Think about it, when you drink your eggnog this season.