It is true that the exact day of His birth is not known, but the year He came to be among the humans is known. It became the dividing of the term B.C. (Before Christ) and A.D. (Anno Domini is Medieval Latin, translated as “In the year of the Lord”). It is how the years are measured within history. It is something that will not be changed until Jesus sets foot upon the Mount of Olives outside Jerusalem. Why? Because He is real. No other has effected how we view time, not even by those that followed their teaching throughout the centuries. Why? Because He really is the Son of God.
It is true though that humans have merged the celebration of His birth with other celebrations. They try to say this for Easter as well, but it is documented which day he did die upon the cross. That is the day when Passover was celebrated by the nation of Israel. The think is Easter is truly celebrated the event that took place three days later upon the Jewish calendar. That would be the day Jesus rose from the dead and returned from paradise and hell with the keys to both. Alive, breathing yet changed. He still bares the wounds to this day, for He is still alive.
This is one of the facts that many cannot get their head around because they are not willing to think beyond what they can see and feel.
This is one of the core elements of faith, to be able to think beyond not only the world around us but to have a believe in God and His omnipotent power to create not only the universe we now inhabit but another realm of existence that is known as heaven and that there are living beings in this place. Not only that, but they have the ability to go between the two. These are the facts for they are shown within the Bible and all scripture is inspired by God.
God is real. Jesus is real and is alive and it is His birth upon this earth to become the sacrificial lamb for our salvation is what Christmas is really all about. We are promised that though Him we will receive an eternal live that is how we also know that He is alive this very moment. Is that not something to celebrate, for that is what this season is truly for and it is well worth it.