We have gone back and forth on this. Something happens, every year, that places us back in the 'modern traditional' Christmas mode. I could argue celebrating to show the world that God is still God and our love and worship for Him.
Then, I could equally as hard argue why you sadden The Lord by placing any importance on a pagan-focused day. Calling it Christian simply doesn't make it so. Shameful activities like celebrating the hanging of the greens within the walls of a church that claims The Holy Spirit...no, I just don't think that pleases God.
Here is a good article, and several links worth reading and truly looking into your reasoning behind celebrating any version of Christmas.
Something to think about:
If you study the Bible closely, you will see that God institutes how He will be worshipped, and expects that and nothing else. We are to obey what He says, and just because He doesn't reference something directly, doesn't mean we can just go ahead and do it, even if we think it is honoring to God. There are many references in the Bible where people tried to sincerely honor God in their own way, and God rejected those acts, whether it was Cain and the fruit of his labors, or the Aaron’s sons who brought their strange fire to God and were struck down dead, to David and his cart for the ark. God never said, "David, don't use a cart." He said, have the priests carry it with the rods. David did it his own way, and the result was bad. If we were allowed to do anything that God has not specifically forbidden, the Bible would be endless with tons of "do nots" to account for every machination our minds could conceive. That's why it's important that the Bible stand alone as the only way directing behavior and action.