Jehenne de Brigue's School Year End Date?

I'm hoping this hasn't been asked before and I've just missed it, but I was wondering when Jehenne de Brigue's school year officially ends? I know the school year starts in the third week of July, so does it finish in late May and then they have two months off? Or is their "summer break" even longer than that?

not an admin obviously but i would imagine it's like university so possibly could finish in May
I don't think it would be any longer though, unless it was fitting in more work experience