The days of the week, for instance.
Do most bible-thumpers even realize that pagan cultures are a huge part of our everyday lives? When they were the predominant world culture, the Greek and Romans gave names to the days of the week, after their gods and celestial bodies. When the Anglo-Saxons invaded, they substituted their own god names.
So we have:
Sunday: Named after that big old star the Sun.
Monday: Named after the Moon.
Tuesday: Tiw's Day named after Tyr, a Norse god of war, equivalent to Mars — Martedì in Italian, Mardi in French, Martes in Spanish.
Wednesday: Woden's Day. Woden, or Odin, was the most powerful of the Norse gods. Take that, hump day. The Greeks and Romans originally honored Mercury on this day, hence Mercoledì in Italian, Mercredi in French, Miércoles in Spanish.
Thursday: Thor's Day, that Norse god with the big hammer. The romance language equivalent is for Jupiter, by Jove: Italian Giovedì, Spanish Jueves, French Jeudi.
Friday: Frigg's Day, the most powerful of the Norse goddesses. Thank God it's Frigg's day. The Romans felt the same way about this being the best day of the week, naming it after their lovely Venus: Venerdì in Italian, Vendredi in French, Viernes in Spanish.
Saturday: Named after the god and planet Saturn.
So if you're still scrambling, trying to make some end of days plans for tomorrow — Saturnalia, anyone?