Darkness makes me feel like this ^
I am from Southern Africa, where the sun rises at about 4.30am and sets at about 7pm in midsummer, and at about 7am and 5.30pm in midwinter. Now I live in Sweden where it is light all the time at midsummer and dark all the time in midwinter.
Darkness all the time makes you very very tired. They do have light cafés here where you can go and get a dose of sunshine and vitamin D, and when it gets really bad they send you to the sun as it is the only thing that will help. In 2006 I was sent to South Africa on medical leave for a month in December/January as I was suffering badly from SAD (Seasonal Affective Disorder). I have never had it that badly again but winter makes me sooo tired.
This November is the darkest on record with 2 sunshine hours so far….this is what the forecast next week looks like….0 hours of sun!