The date varies from December 20 to December 23 depending on the year in the Gregorian calendar. Yule is also known as the winter solstice in the northern hemisphere and the summer solstice in the southern hemisphere due to the seasonal differences.
Yule is when the dark half of the year relinquishes to the light half. Starting the next morning at sunrise, the sun climbs just a little higher and stays a bit longer in the sky each day. Known as Solstice Night, or the longest night of the year, the sun’s “rebirth” was celebrated with much joy.