My grandparents are farmers in part of Northern Europe where currently it’s dark from 11pm - 3am (it’s never truly dark though, and if you look North in the middle of the night it is distinctly brighter). Their sleeping patterns do strongly follow that of the sun, in the winter they sleep more and in the summer they sleep a lot less.

For the work they do this is good though, in the summer there are a lot more things to do, whereas in winter when it’s -20c and the ground is covered in snow, there isn’t very much to do.

In a way I think they have it better than me, trying to go to sleep when it’s still a bright sunny day outside just feels weird.

Or it is possible that humans are maladapted to living in the artic circle.

Maybe by extension it’s not really worth living there ;)