How many hours do university have?

In college you make your own schedule and there is no set time. For example, you can have 1 class on monday from 10-12 and another from 6-9 and so on and so fourth

Everyone has different timetable.

For science and engineering, they usually have more regular but longer hours, it could be 8am-5pm straight. for other students, it varies depending what courses. courses usually start earliest at 8, it some course could be late till 9pm. each course last around 2-3 hours. and tutorials are around 1hour

It depends on you school rest time.Many universities start class at 8 am,and end with 10pm.

It depends on when your classes are scheduled. Typically colleges open for classes at 8am, although some have classes starting at 7. Most classes dismiss by 10pm.