This is when when the sun appears to be at its southernmost point in the sky; as such, the Southern Hemisphere has its longest day of the year, and the Northern Hemisphere has its shortest day of the year, on the December solstice, according to EarthSky.
People around the globe have celebrated this astronomical milestone for centuries.
Winter Solstice 2018 date and time? It derives its name from the Latin word "solstitium", which means "Sun standing still".
But it's not just the first day of winter, we are about to see a full moon! This happens twice yearly, once in each hemisphere.
Charles Barkley on Anthony Davis to the Lakers: 'The fix is in'
LeBron James recently noted that it would be "amazing" and "incredible" if Anthony Davis joined him on the Los Angeles Lakers . As the 2018-19 season continues to drag on, don't expect chatter of Davis being traded to the Lakers to die down.
Friday night is also the peak of the Ursid meteor shower, but a near-full moon and cloud cover will make for poor meteor-viewing conditions.
When is the winter solstice? At this time of year, each day is about 24 hours, 30 seconds long. This is all made possible because Earth's axis sits at a 23.5 degree angle as it revolves around the sun.
In clear conditions, light from the rising sun lights up the inner chamber of the 5,000-year-old tomb.
Today marks the solstice, when the seasons change, and Google has designed a pair of charming animated doodles to commemorate the celestial moment.
Gathering pagans also sang and played music at the winter solstice celebration in County Meath, Ireland. China marks the start of winter with the Dongzhi festival, during which families come together and enjoy rice balls called tangyuan. This treat is said to bring prosperity and unity-something all of us can enjoy on this auspicious day.