SEASONAL AFFECTIVE DISORDER   The daylight hours are reduced, the skies are gray and it’s cold outside. You feel like staying in, you have no energy and feel like sleeping all the time. Are you feeling sad?  Some people call it the wintertime blues. Could you possibly have Seasonal Affective Disorder (SAD)?   WHAT IS SEASONAL AFFECTIVE DISORDER (SAD)?   Seasonal affective disorder can occur any time of year. SAD usually occurs during the fall and winter (it’s not the same as the holiday blues). Sometimes it’s called the winter blues. During the fall and winter, we have less daylight hours.  Less daylight hours can change chemicals in the.