All You Need to Know About Seasonal Affective Disorder.
Seasonal Affective Disorder (SAD), a form of major depressive disorder (MDD) with a seasonal pattern, is triggered by seasonal changes, typically starting in the fall or winter. It affects about 0.5 to 2.4 percent of people in the U.S., mainly women and young adults, especially those living in northern regions.
References:
https://www.healthline.com/health/seasonal-affective-disorder
