I remember when I was about in 4th or 5th grade I was sitting in a small classroom group (for whatever reason), and this girl piped up "I heard the school is going to have a new thing where kids go to school for five days, and then have two days off. Then five days, and two days off." "Really?!" I asked excitedly. "Yeah, Saturday and Sunday!" the teacher chimed in. "Yep!" the girl said.
I'd never been so furious. I don't know if the girl was trying to be cute or funny or whatever, but she sounded more crazy than anything.