For many people, the seasonal changes in daylight and outside temperatures signal a marked difference in mood, energy, outlook and interest in regular activities and sleep and eating patterns. Experts call this syndrome Seasonal Affective Disorder, a subtype of major depressive disorder. The links between seasonal changes and this symptom picture are quite noticeable and cannot be attributed to other psychosocial stressors that may occur, e.g., around holidays. Persistent low mood and energy and lack of interest in activities can be alleviated. One of the most common interventions is increasing exposure to bright light by means of “light boxes”. These are made by various companies and are available on the internet. Research results on the efficacy of light boxes are limited, but many anecdotal reports suggest that, for many users, there is a benefit from this technique. Other treatments include psychotherapy or medication. Your family or primary care physician may be able to refer you for further information and help.