Sunrise & Sunset widget has 1-hour shift

Did you try to update the time of the watch with GPS; so it knows where you are?

Yes, I've synchronized time with GPS several times. Time on watch face it's correct. I'm from Poland.

I have sometimes had correct time and correct time zone, but wrong location after doing GPS activities on trips elsewhere. Then I also got sunset and sunrise times for that location instead of my current location. I am not using a widget, but I have the sunset and sunrise on the watch face.