It’s the coldest and darkest time of the year in the Northern Hemisphere. We celebrate and make merry with the holidays, but the passing of the winter solstice near the end of December reminds us we have a lot of dark winter ahead. Seasonal affective disorder (SAD) is a serious manifestation of winter blues, but the cold and dark can have many effects that are more subtle. In Denmark, the lifestyle concept of hygge aims to introduce warmth and coziness during this time through candlelight, cheerful company, and indoor activities. We have no such formal notion in the U.S., but a few strategies stand out as accessible to the average American. Light The first is inviting in the light during the dark time of year. This can take many forms, including candlelight or a wood or gas fire. The light and warmth of fire can help burn away the winter blues. …