2319 Mandela effect

At work today someone shouted “2319!” we all had a good laugh. Then one of the ladies I work with asked if I knew what 2319 was in reference to (as in outside of the movie). I said with confidence that I heard it was the number of a classroom a lot of the animators went to. She said, “oh I thought it was for W(23rd letter) and S(19th letter) and that it stood for white sock.

I said, with confidence, “I think I’m right on this one” and we did some googling and multiple sources confirmed white sock and nowhere said anything about a classroom number.

Does anyone know where I might have heard this or have you heard it too?