Trivia: Alfred Hitchcock makes a cameo during the scene when Marion Crane walks into her office - he is standing outside the office on the right. (00:07:00)
Continuity mistake: When the Highway Patrol Officer hands the driver license back to Marion, in the interior shot he's holding it out with his right hand and Marion takes it with her left hand, but in the next exterior shot he's handing it to her with his left hand and Marion is taking it with her right hand. (00:15:50)
Answer: No, it was a Sunday. However, December 11th fell on a Friday in 1959, the year before release.
LuMaria 1