Why is the school sports meeting usually in October?

I am a high school physical education teacher, which is not a rule, but according to the arrangement of school physical education work. For example, our school sports meeting is also in 10, and the basketball game is in April. This will ensure that there will be big sports activities next semester. Secondly, 10 can participate in the third grade. If you put it in the first half of the year, the senior three will take the college entrance examination soon, so naturally you can't attend! Therefore, sports are mostly in October!