In Elementary school, in Newfoundland, we went to class from 8:30 to 3:30 both times Newfoundland Standard, which offsets about 30 minutes from Eastern daylight.
In Middle school, in Newfoundland, we went to class from 9:00 to 4:00.
In High School, Grade 9 and 10, we went to class from 7:00 till 2:00.
When my family moved to Crofton, we got started at 8:45 and ended at 3:45, also we had tutorials, which were 2 hours long. As you might know, that is in the Eastern time zone.