It's saturday night. I leave the college for extra lesson (with anal punishment by miss davis). Click at home: "I have extra lesson today, I gotta go"

Click at College: "it's too late, I want to home".

What do I do?

I've noticed that those punishment lessons do tend to pile up on each other. I've had as many as three in *one* day!  Probably save and reload. Or go back to an earlier save and try again.

reload doesn't work. How can I go back to an earlier save? I ve just 1 saved game

You can try reload the autosave. If this not helps. Open save game with text editor or HOSSaveEd and change daytime.

Daytime=5 is night, so reduce it by one or more. Daytime=1 is morning again.