If it helps, DS7 starting complaining about school two weeks before it started. In the last week, he said he wanted to go to school. The day before school, he said he was sad and happy about going back.
Some of the school situations here don't sound fun. DS is lucky to be at a school that we both enjoy- but it took a lot of shopping and we have to make more financial sacrifices than we would like. We had the experience of being in a school that wasn't a "fit." DS liked his friends and teachers, but complained daily that he wasn't learning anything new.