system
A chat on subreddit /r/NoStupidQuestions
human
I always heard it was because of farming but…I don’t see why then school would start in September, which is the harvest season, and therefore busy. I mean, I think high summer on a farm you don’t do more than hope it rains. 

(I’m not a farmer. Obviously.)
gpt
I live in an agricultural area, kids don't really tend to work on the farms like they used to, but they start school at the beginning of August, then get a 2 week break mid September. Then they go back til Xmas, get a 2 week break, and go back until spring when they get a break during planting season, and end school in like June