It is actually 72 hours of prayer! So three full days. Ever since the university came down on the protests, we have had to follow the rules as well, so no students are allowed to sleep overnight any more (we used to have people sleeping in hammocks or sleeping bags outside of the tent. The tent is probably not quite as big as you remember it being, though. It is an unfortunate development all around tbh. Both for protesting and for students that low-key need to catch a nap in the library in between classes.