Roman Catholicism has feast days to remember saints. St. Nicholas' falls in December.
Deep. There's actually a Russian Orthodox Church dedicated to Nicholas in Seattle. It's really Russian Orthodox (or so it says, I've never been inside). The architecture is exactly like the Kremlin architecture in Moscow. By the way, the Kremlin was built as Saint Basil's. Nicholas and Basil were both czars of Russia, back before the 1917 revolution.