Winter’s a time to celebrate the holidays with family and friends. For many seniors, however, it’s also a time of combating seasonal disorders and winter blues. Cold, dark winter days can play on seniors’ emotions, triggering a disorder called seasonal affective disorder (SAD). SAD symptoms can include sadness, loss of appetite, sleeplessness, and lack of interest in socializing with others. Seniors are also prone to Vitamin D deficiency during winter due to limited sunlight; this deficiency can trigger depressive feelings and mood swings.