Sunday - Thursday
8:00 a.m. - 9:30 p.m.

Friday and Saturday
8:00 a.m. - 11:30 p.m.

Is sometimes in the library as early as 6:00 a.m., so he'll let students in if any happen to show up.

Closing time actually coincides with the curfew, but he starts kicking people out a half hour earlier so they have enough time to make it back to their common rooms. He can sometimes be begged into allotting more time if a student is particularly desperate to finish an assignment.