Seasonal Affective Disorder
Abbreviated S. A. D.

400 B.C., Hippocrates,described patients with seasonal depressions.

By the second century, Greek and Roman doctors were directing sunlight toward the eyes to treat depression and lethargy.

6th century Goth scholar Jordanes described winter depression in Scandza (a Nortic country)

1984, Norman E. Rosenthal published his first paper on SAD and light therapy.