[brokenkebab]

You need to sleep at the time and duration that your feelings indicate to you

It's oversimplification. Those signals are dependent on light, among other things. And unless you live with no electricity they may fool you.

[maccard]

> And unless you live with no electricity they may fool you.

I live in Scotland - during the winter we get 8-ish hours of daylight, during the summer we get more like 17,(to the point that it doesn't actually get properly dark at night). Routine is far more important here than natural light.

[brokenkebab]

Absolutely, but establishing routine means overwriting your natural signals with acquired habit, not following them.