According to the law, saturday detentions are allowed, but they are optional, furthermore "a child can not be discriminated for opting out of a saturday morning detention" (or words along those lines). However,when in my school i decided not to go to a saturday detention, the school argued that since i am a minor, it is up 2 my rents 2 decide if i shud go to the detention or not. And also cos its a private school, there was a contract my mum and dad signed saying that they can make me go to saturday detentions.
I tried to argue that the 'contract' was signed almost 8 years ago, and that things may of changed since then, but it didnt work