I rather doubt the term "Saturnalia" has any more accuracy than "Christmas." And 90% of the people opening gifts under a tree on December 25th would vehemently deny any any religious connection to the event other than Christianity. No matter how shallow their religion.
True Christianity really doesn't have any holidays. Some of the more high strung might celebrate Jewish holidays, but that may not be any more acceptable than a pagan holiday. (No, I am not equating Jews with pagans, I am pointing out that the new testament book of Galatians makes it clear that Christianity is a clear break from Judaism.)
The same writer, Paul, makes it pretty clear though in Corinthians that you may celebrate whatever holiday you wish, or not.
I rather doubt the term "Saturnalia" has any more accuracy than "Christmas." And 90% of the people opening gifts under a tree on December 25th would vehemently deny any any religious connection to the event other than Christianity. No matter how shallow their religion.