Even if the Pope is right and the birth of Christ didn't come on the day or in the year that historians and theologians have always believed, it doesn't matter one whit. We have celebrated Christ's birth on December 25 for centuries, and will continue to do so at least until he returns.
There is something extra special about Christmas. There is a universality to it that sets it apart from other seasonal celebrations. And nothing can overshadow the anticipation, the excitement, the ambience of Christmas.
With its theme, passed down from generation to generation, of peace on Earth and goodwill to Mankind, it is the one time of the year that brings all the nations, at least of the Western world, together in a common celebration, be it of the birth of Christ, of another year survived, of the beginning of a long holiday, of reunions with family, or simply of the opportunity to shuck off the cares of the world, relax, give and receive gifts, eat, drink and be merry.
It is in particular, and always has been, a time for children. For most it is breathlessly looked forward to the giving (but mainly receiving) of presents; for a relaxing of rules; for a surfeit of sweets without having to eat veges first; for visits from or to seldom-seen relatives; for holidays away from home, new friendships, new adventures.
But, sadly, it would be dishonest not to admit that for many it will be a time of disappointment, of hardship, even of terror, because there is no Christmas tree or Santa Claus, no money for presents and a festive board provided by charity; because mum and dad aren't together anymore; because, perhaps, there is violence or abuse in the home.