The boys had their classroom parties on 10-18. It was actually a "Fall Party" but the kids could wear costumes. They are trying to get away from the "Halloween Party", but I'm not sure where the costumes come in. Mason opted not to dress up for the party. I was glad when I arrived that about 1/4 of the kids were the same way. It was his last classroom party for fall (no parties in 5th grade).