"While many of us are familiar with SAD, there are, in fact, people who get SAD in reverse."

"For a small group of people, the dark days of winter don’t elicit depression, but renewed vigor and improved mood.... While winter SAD is linked to a lack of sunlight, it is thought that summer SAD is due to the reverse—possibly too much sunlight, which also lead to modulations in melatonin production.... Melatonin is a powerful antioxidant and free radical scavenger that serves to protect the brain. However, more importantly, melatonin’s immediate precursor is the neurotransmitter serotonin, a major player in regulating mood. By reducing melatonin production, SAD increases the risk for depression and other mood disorders.... [T]hose who experience reverse SAD will take comfort in knowing that the winter months can bring nothing but bliss with the gloriousness of gray skies, 15-hours of darkness, and bone-chilling winds."

That's from Psychology Today (in 2015). I'm reading that after someone on Facebook linked to "The Obsessed Ex-Fortysomething Runner: Brown eyes, SAD, and 'reverse' SAD."

I call the 30 days with the winter solstice in the center "Darkmonth," and it's just beginning. You might wonder why I'm not hot to move somewhere brighter than Wisconsin, now that I'm retired and could relocate anywhere. Maybe my preferences have to do with eye color.

Here's another article about the new study by a psychology professor at the University of South Wales. "[H]e found that those with brown eyes were significantly more likely to experience seasonal mood shifts than those with blue eyes... 'Individuals with blue eyes appear to have a degree of resilience to SAD'..."

As for "reverse SAD," it should be noted that you can wear sunglasses! I think a blue-eyed person artificially creates the equivalent of brown eyes in the summertime. So maybe the North is a good place for me....