在上学期间的晚上英文：On school nights。

nights：

n.夜;夜晚;晚上，夜晚(夜里就寝前的一段时间);(举行盛事的)夜晚;…之夜；

night的复数

I'm not allowed to go out on school nights either.

上学似时的晚上也不让我外出。

So they don't allow him to practice running on school nights.

因此，他们不允许他在周内的晚上练习跑步。

For example, I have to stay at home on school nights.

比方说，上学日的晚上我必须要待在家里。

Don't go out on school nights.

学校有课的晚上不得外出。