[doubled112]

I don't think this is the same for everybody.

I've experimented with sleep schedules a few times. If I go to bed before I'm ready I will not sleep very much at all. Best for me is when I go to bed at roughly 1am and wake around 7am. If you want me awake at 3am, I will need to stay up that late. As I learned resetting myself after overnight shifts, no matter how early I go to bed, I will not be functional at that time.

[j45]

It's very possible it's not the same for everyone. The circadian rythmn is universal though, and no human is really excluded from it. There might be a shift from it for some but verifying it is the important part to remove guesswork.

It also seems the case that sleep adjustments, in any direction, don't happen over night.

Consistency is the most important thing no matter what anyone does.