Feliz Navidad – the Happy Nativity of Jesus Of Nazareth – Jesus Christ – some 2000 years ago is commemorated on December 25th.
Wikipedia says that in their July 2012 estimates, the CIA World Factbook gives the world population as 7,021,836,029. Of those, Christians 33.35%, with just over half that total being Catholic and the balance spread among Protestants, Orthodox and other Christians. Here in the U.S, roughly 3 out of 4 this year self identify as Christian. Almost everyone in America celebrates Christmas in some way.