Seasonal affective disorder - or SAD - isn't just 'winter blues'Seasonal affective disorder - or SAD - is often dismissed as "winter blues" or "depression-lite" - actually it is a "major depressive disorder".
Source: Seasonal affective disorder - or SAD - isn't just 'winter blues' (https://news.sky.com/story/seasonal-affective-disorder-or-sad-isnt-just-winter-blues-12983739)