Seasonal depression, also known as seasonal affective disorder (SAD), is a type of depression that occurs during different seasons of the year, usually during the winter months. There are many synonyms for seasonal depression, including winter blues, winter depression, seasonal affective symptoms, winter melancholy, and cold-weather blues. These terms all describe the same feelings of depression, fatigue, and sadness that many people experience during the colder, darker months of the year. The good news is that there are many treatments available for seasonal depression, including light therapy, medication, and counseling, which can help alleviate symptoms and improve overall quality of life.