"(SAD) is a form of depression that appears at the same time each year.
With SAD, a person typically has symptoms of depression and unexplained
fatigue as winter approaches and daylight hours become shorter.
- Changes in mood
- Lack of enjoyment
- Low energy
- Changes in sleep
- Changes in eating
- Less time socializing"
More info here
Ps. Suddently I feel SAD but it's not the light...
is the lack of beauty, emotion and love.