I usually fall asleep between 12am and 2am, and wake up at 7:50 for work. I am usually refreshed enough for a day's work, but it takes a while to wake up. Showering in the morning helps a lot with that.
I can catch up on weekends, but that's more a want than a need.
I find my brain is more active after the sun goes down, and I believe (however misguided this may be) that the sun is noisy and affects my thinking. So at around 9pm I am very productive. Unfortunately, my spouse goes to bed at 10pm, so I usually end up sitting in bed reading news on my phone for two or more hours.
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If you break a crumb in half, you have two crumbs - George Carlin