Audio problem: When Norman runs down from the Bates house to the motel and meets Marion, he says "Gee, I'm sorry I didn't hear you in all this rain. Go ahead in, please." But you look closely, it looks like Norman is barely moving his lips. In fact it looks like Marion is saying something instead. (00:27:50)
Audio problem: When Norman enters the cellar to kill Lila and is grabbed from behind by Sam, Mother's voice can be heard yelling, "I am Norma Bates." However, this was added in post-production, as his lips are not moving.
Answer: No, it was a Sunday. However, December 11th fell on a Friday in 1959, the year before release.
LuMaria 1