The most depressing day of the year

With gloomy weather, end-of-year festivities far away and good resolutions in disarray, the 3rd Monday in January is said to be the worst day of the year for morale. This theory may have no scientific basis, but it nevertheless echoes a winter reality: SAD affects 2 to 3% of the Swiss population, and cold-weather blues are felt by around one in 10 people. The cause: lack of light. What are the solutions for getting back on track?