The longest night of the year followed by the sun's "rebirth" and lengthening of days. In most traditions, Yule is celebrated as the rebirth of the Great God, who is viewed as the newborn solstice sun. Some pagans consider Yule to be the beginning of the new year. One of the eight major annual sabbats or festivals.
General practices: Burning the yule log (which was traditionally part of last year's yule tree) is an act of faith and renewal that, indeed, the light, and the warmth will return.
Description provided by University of Missouri's Inclusion, Diversity, & Equity Division