You have a point and it does help not drinking coffee but I just feel like crap if I wake when it's dark outside. While if I drink coffee in the afternoon it's

You have a point and it does help not drinking coffee but I just feel like crap if I wake when it's dark outside. While if I drink coffee in the afternoon it's fine. I have had this for many years and I have experimented with it (like I mentioned as well) but getting up before 9-10 just makes me feel like shit while getting up after doesn't. When there is strong sun outside when I wake, then I feel fittest when waking up. When it rains or is dark and there is a lot of artificial, especially tl, light around, like an office early in the morning on a rainy day, I feel ill for hours. Always have. It passes after around 10 if it stays dark outside. So why not then just wake after 10 in the first place, it's not like i'm productive in that phase... It's just like working with someone in a slightly different timezone, no-one I ever met cared about it and actually most my colleagues have had the same or similar issues with getting up early.