Seasonal Affective Disorder
Seasonal affective disorder (also called SAD) is a type of depression that occurs at the same time every year. If you′re like most people with seasonal affective disorder, your symptoms start in the fall and may continue into the winter months, sapping your energy and making you feel moody. Less often, seasonal affective disorder causes depression in the spring or early summer.
SAD often occurs during the holidays. While the holidays are thought to be the happiest times of the year, for many they are the most stressful, hectic, and often times depressing parts of the year.