When Loretta Young meets Van Johnson at his home for dinner, the candles are lit about the room. When she gets up to leave quickly and then meets the dean and his wife at the door then they all return to the living room, the candles are all snuffed, and van had followed her to the entry hall.
During the dinner scene, the Dean tells his wife it's midnight and they have to go. Abigail decides to leave, and the professor walks her home. As they're walking in the park, you can see the sun shining down on the trees and grass. Yet it's midnight.