The winter solstice is the shortest day and longest night of the year. In the Northern Hemisphere, it takes place between December 20 and 23, depending on the year. (The reverse is true in the Southern Hemisphere, where the shortest day of the year occurs in June.) Cultures around the world have long held feasts and celebrated holidays around the winter solstice. Fire and light are traditional symbols of celebrations held on the darkest day of the year.
The winter solstice is the day of the year with the fewest hours of daylight, and it marks the start of astronomical winter. After the winter solstice, days start becoming longer and nights shorter as spring approaches. Humans may have observed the winter solstice as early as Neolithic period—the last part of the Stone Age, beginning about 10,200 BC. Neolithic monuments, such as Newgrange in Ireland and Maeshowe in Scotland, are aligned with sunrise on the winter solstice. Some archaeologists have theorized that these tomb-like structures served a religious purpose in which Stone Age people held rituals to capture the sun on the year’s shortest day. Continue reading from History
8 Winter Solstice Celebrations Around the World (History)
Everything You Need to Know About the Winter Solstice (National Geographic)
The Magical History of Yule, The Pagan Winter Solstice Celebration (Huff Post)
What's the Difference Between a Solstice and an Equinox? (Britannica)
Winter Solstice at Newgrange (BBC)