[AnthonBerg]

Ah, indeed – we’re on the same page! (I wish this wasn’t a belated reply…)

One thing is that I’m “forced” to pretty strictly wire my circadian rhythm to the societally defined clock.

This also defines much of what is the actual input into my circadian sensorium: Artificial light :)

I am able to have a remarkably consistent circadian rhythm, going to sleep arounnnnd, say, 11 PM? Waking up around 8-ish. Those times wiggle around a little.

It’s subtly tricky to put into words –meaning it’s interesting! — and I’m not even absolutely sure that this is everything that defines the machinery, but given this, uh, “framework”?, it’s ludicrously consistent: If I back my neuroendocrine system into a corner, it will bite at 5:30. Sometimes a bit earlier.

Thanks for the discussion! I hope we are actually on the same page w.r.t. premises and that I’m continuing this on the avenue you’re looking down!