After the Norse brought Yule into prominence it nearly replaced Samhain as the date of the New year, and many modern Celtic covens still honor Yule this way. The Nordic-influenced Celts celerbated Yule with many of the trappings we associate with modern Christians observances: decorated evergreen trees, wreaths, holly, mistleteoe, feasting, and dancing.
They also believed that on this night the Holly King, as the God of the waning year, would battle the Oak King, the God of the waxing year, and lose. Often Yule coven rituals have members reenact this fight.
This is the time of death and rebirth of the Sun God. The days are shortest, the Sun is at its lowest point. The full moon after Yule is considered to be the most powerful moon of the whole year. This ritual is a light festival, with as many candles as possible on or near the altar in welcome of the Sun child.