Because Christ's birth was announced by Pope Julius I 375 AD that the date of Christ's birth was "discovered" in December the 25th. Well, December 25 is also the date that many of the pagan gods were created. Maybe it was another scheme of the Roman Catholic church so that the Roman pagans could convert into Catholic Christianity easier.Listen to these sermons by Dr. Scott Johnson about this topic.http://www.sermonaudio.com/sermoninfo.asp?SID=103007130530http://www.sermonaudio.com/sermoninfo.asp?SID=103007145342http://www.sermonaudio.com/sermoninfo.asp?SID=10300715424