Ah, Mark... ALL major modern Christian holidays overlap original pagan celebrations. Easter is a "Sprint Fertility" holiday. Ash Wednesday is an attempt to reign in the revelry of Carnival, originally a time when hunting wasn't so good. All Saints Day is a cover-up of All Hallows Eve, or Halloween in the vernacular. Christmas overlaid Saturnalia. If it weren't for the screwed-up calendar from Julius Caesar, Christmas would ALSO overlap the Winter Solstice. But that calendar drifted because it didn't do leap years correctly.