The Bible says Jesus was fully human and fully God, the second part of which you chose to leave out. If you or anyone chooses not to believe it, fine, but there is no need to misrepresent what The Bible says.

“Don’t let anyone capture you with empty philosophies and high-sounding nonsense that come from human thinking and from the spiritual powers of this world, rather than from Christ. For in Christ lives all the fullness of God in a human body.”
‭‭Colossians‬ ‭2:8-9‬ ‭NLT‬‬
http://bible.com/116/col.2.8-9.nlt

Christmas is the day Christians celebrate the birth of Christ, though most of us know it is not the actual date of His birth. Whatever the day has meant to others, it is unlikely it would be celebrated to any extent at all were it not for the significance of Christ. Otherwise it would be called by another name, right?