It is common to face many days of darkness during winter. This often affects our mood, which is heavily affected by the cold temperatures of the season, the lack of sunlight, causing unstable mood and lack of motivation. These are some of the symptoms of what we call ‘seasonal affective disorder’ (SAD). According to a UK research, one in three people suffer from the disorder every year. But what exactly is SAD, what are the symptoms, and how can we combat it at work?