December 25th, 1642, Julian calendar, Sir Isaac Newton is born. Jesus, on the other hand, was actually born in the summer. His birthday was moved to coincide with the traditional Pagan holiday that celebrated the Winter Solstice with lit fires and slaughtered goats. Which, frankly, sounds like more fun than 12 hours of church with my mother followed by a fruitcake. –Merry Newtonmas, everyone!