I live at ~64 deg latitude in the USA (Alaska) and 100% agree with everything you said. The timing of sunset has such a profound effect on when you consider the day "done". In Dec it's painful to haul myself outside at 5 or 6 PM since it's "night time" already. Meanwhile in June, at 11PM/23:00 when it's still bright out I have to remind myself to home and go to bed so I'm not a tired wreck at work the next day :)