That's exactly my problem. A few years ago I tried to follow that pattern. I got as much sleep as I liked (8-9 hours usually) and went to bed when I was tired.

That's exactly my problem. A few years ago I tried to follow that pattern. I got as much sleep as I liked (8-9 hours usually) and went to bed when I was tired. It just got later and later until I went to bed just before sunrise and woke up just after sunset. Missing sunlight was actually quite horrible so I ended the experiment after that!