Happy Winter Solstice! Monday marks official start to winter, shortest amount of daylight MATT DUNHAM/ASSOCIATED PRESS People gather inside the ancient stone circle of Stonehenge, in Wiltshire, southern England, as access to the site is given to druids, New Age followers and members of the public to mark the annual Winter Solstice, Friday Dec. 22, 2006. The Pagan celebration of Winter Solstice was marked at sunrise on Friday morning as the solstice occurred at 0022 GMT on Friday. Celebrations have been canceled in 2020. (AP Photo/Matt Dunham) and last updated 2020-12-21 09:02:14-05 The shortest day in what feels like the longest year has arrived. Monday is the Winter Solstice, the day each year when there is the least amount of sunshine in the Northern Hemisphere.