Here's a study that claims night owls are "cognitively superior" and that whatever chronotype you are, you must organize your life around that.

https://www.pbs.org/newshour/show/study-finds-night-owls-have-superior-cognitive-function-compared-to-early-risers

Here is a study that claims you are not beholden to whatever chronotype you think you are, and can retrain yourself.

https://www.birmingham.ac.uk/news-archive/2019/night-owls-can-retrain-their-body-clocks-to-improve-mental-well-being-and-performance

And here's a study that suggests there are actually 6 chronotypes.

https://www.sciencealert.com/scientists-say-there-are-6-human-chronotypes-not-just-morning-people-and-night-owls

brb, i need to decide if I am a moderately active chronotype or a daytime sleepy chronotype and what effect that will have on my chances of requiring a disability pension or developing diabetes.

It's all these morning people who make me live on their schedule that are killing me.

Haha, that feels great as someone with severe delayed sleep phase disorder 😀🙃

I used to think I was a night owl, but then I bought darkening curtains and a bright artficial dawn lamp. I spend severals hours in the dark before bedtime, and the electric sun rises one hour before I need to wake up.

This shows why it's necessary:
https://en.wikipedia.org/wiki/Phase_response_curve