Even with Flux, setting the profile automatically breaks down at high latitudes. If you're far enough from the equator, the sun can sod off most of the year as for how it relates to human biorythms.

I'm 60°N, as with my alarm clock, I've set a static profile to follow 365 days a year since the sun is unreliable.

or gtk-redshift (if you are on X11).

Happily KDE has it built in and does both location detection, enter co-ords or click map for setting it how you want.