What is Seasonal Affective Disorder?Seasonal affective disorder* is a form of depression also known as SAD, seasonal depression or winter depression. In the Diagnostic Manual of Mental Disorders (DSM-5), this disorder is identified as a type of depression – Major Depressive Disorder with Seasonal Pattern. People with SAD experience mood changes and symptoms similar to depression. The symptoms usually occur during the fall and winter months when there is less sunlight and usually improve with the arrival of spring. The most difficult months for people with SAD in the United States tend to be January and February. While it is…