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Where I live, the sun sets in November and returns in February at this time of the year. Sync to that ;)

Likewise it does not set for weeks in summer.

This is a sane idea, but sunrise is often far later than when people are expected to get up 'early'. And add the crazy that DST is to one's schedule, and waking up early becomes a very strange, shifting ideal. (Lately, I've heard 4am to 5am match this ideal; personally I like to have attainable goals, like slouching into work before the crack of noon.)

Yeah DST throws a huge wrench into this whole plan. Good luck waking up with "sunrise" for work.

Sun cycle varies widely during a year i.e. Sun rises at ~8.30am and sets at ~4pm here now, so do you really imply I should sleep 17 hours a day? Similarly, I should get up before 5am at summer. I agree that, ideally, yes, we should align with the Sun cycle, but as many things in real world, it's just not possible or practical.

A sun-conscious sleep pattern in Wisconsin implies a 9-hour waking day for a good chunk of the year. No thanks.