Either I didn&#x27;t look closely enough or I didn&#x27;t get it how this would work in the winter.<p>In January, like now, in Germany sunset should be at ~8 am and dusk should be before 5 pm. That&#x27;s only 9 hours. I&#x27;m probably not working hard enough (physically) but how would I ever sleep that much?<p>In June there&#x27;s daylight from 5 am to 9 pm, that&#x27;s still 10 hours of darkness, I see how it would work there.