Brittney Schrick Seasonal Affective Disorder (SAD) is a type of depression that is linked to a particular season, often fall and winter, which causes fatigue and feeling moody or down. It is important to know the symptoms and treatment options. 1 20 2017 Friday, January 20, 2017 11:55:42 AM CST Family Life Fridays,coping afranke@uada.edu