Originally Posted by mball

It's changed over the years too. Long ago, there used to be more exams scheduled at the same time, but it led to more conflicts and a lack of space, and with fewer exam slots students had more final exams in one day. (9 hours of exams in a day is definitely no fun!)

My experience is that Berkeley's 10pm is later than many schools, but it's not a complete anomaly. We also tend of have evening out of class midterms in some programs. All just due to practical reasons of booking rooms.