Even if...

Even if before school starts, your day consists of the following:

Teach lesson one.
Teach lesson two.
Tutor time.
Break duty.
Teach lesson three.
Teach lesson four.
Skimpy 30 minute lunch (of which only 7 were spent sat down eating - I always thought I'd be one of the rather large percentage of teachers who die within 18 months of retiring, however, I think death by indigestion is far more likely)
Teach lesson five.
After school 'enrichment' activity.

...dawn kicks dusk's ass!