So, let me get this straight: In December, I should wake up around around 9:30 or 10:00 and go to sleep around 2:30 to 2:45 in the after noon. Today, I should

So, let me get this straight: In December, I should wake up around around 9:30 or 10:00 and go to sleep around 2:30 to 2:45 in the after noon. Today, I should have been awake at 6am and I should go to bed this evening around 6:45. In June, I should be going to sleep around 11:30, but make sure I'm awake around 3:00 or 3:30 am. If I lived further north, I just shouldn't sleep for a while during the summer, I guess, and hibernate during the winter. This doesn't seem healthy to me. Those are my actual sunrise/sunset times, and it is obviously ridiculous advice. And it isn't just me: Folks have different internal clocks, folks have children, and we have never really risen and slept as group. Not to mention that a large swath of folks don't actually have a choice in their daily schedule: Heck, we know teenagers and young adults do better when they sleep later and wake later, yet we schedule school early in the day. And I'll mention that you aren't really freeing yourself from the clock here: You are just trading something with numbers for a bit fireball in the sky - just an imprecise clock. Honestly, if you have the privilege to do it, generally sleeping when you are tired and waking when you are rested is probably best - and what that schedule is will probably depend on not only your internal clock, but the things around you (like infants and small children). By all means, if you work best getting up and sleeping early, do so. And you know, ignore advice that is obviously simplified so much. Edit: Forgot to add the official sunrises: https://www.timeanddate.com/sun/norway/trondheim https://www.timeanddate.com/sun/norway/trondheim