I wake up at 4-5 in the morning to see my wife out the door. She comes home early. We still get our 8 hours of sleep because we start winding down at around 19:

I wake up at 4-5 in the morning to see my wife out the door. She comes home early. We still get our 8 hours of sleep because we start winding down at around 19:00 and are in bed by 20:00-21:00. I live in the U.S. so perhaps you can appreciate me using what we call "military time" ;) 6:45 sounds like a reasonable time IF you don't try to juice another extra hour at night and go to sleep around 22:00 (10PM). People very often go all they way to midnight and later to squeeze in that one more Netflix show episode, and then they feel like a drunken fly all day the next day. It's not worth it. BTW, I had to wake up to go to school at 5:45 every morning, but I did not have that sleep discipline. It's a miracle that Sony alarm clock survived without deadly injuries.