On Dec. 21, the northern hemisphere celebrates the winter solstice, the shortest day of the year, or the longest night.
While it’s the darkest time of the year, the day also marks a turning point. From here on out, the the sun shines a little longer each day, and we begin the slow march toward spring. Fittingly, the winter solstice is celebrated by cultures the world over as a day of hope and resilience, and has figured prominently in religious rituals.
For the ancient Romans, the wint