it's every day. I've tested doing it earlier and I don't notice a difference. I live in Canada we barely get sun here anyways. Only thing is if my neighbors are making a ruckace. redicolous because I live in a detatched house but they have kids who think it's cool to play basketball on our mutual driveway at 730am and they don't really care that it pisses me off lol
Earplugs?
Light is the driver of circadian biology, and its nearly impossible to have sleep problems if you are living by mother nature's clock.
Before humans invented artificial lights sleep problems weren't really a thing.