Winter solstice 2017: Five things you should know about the shortest day of the year https://www.washingtonpost.com/news/capital-weather-gang/wp/2017/12/21/winter-solstice-2017-five-things-you-should-know-about-the-shortest-day-of-the-year/ https://twitter.com/drsekula/status/943847338845638657/photo/1 https://chirp.cooleysekula.net/attachment/45957