Yule is typically celebrated on the Winter Solstice, and within Wicca and NeoPagan paths that are Wicca-inspired, it is the celebration of the rebirth of the God and the return of the light. It's the longest night of the year, and though there is still the worst parts of winter to come, the days from this point forward will get longer, giving hope until Spring approaches.
It's also a really good time also for taking stock of the year that has past, and thinking about what you might like to accomplish in the year to come.
Wicca (English pronunciation: /?w?k?/) is a modern pagan religion that draws upon a diverse set of ancient pagan religious motifs for its theological structure and ritual practice. The religion usually incorporates the practice of witchcraft. Developed in England in the first half of the 20th century, Wicca was later popularised in the 1950s and early 1960s by Gerald Gardner. Gardner was a retired British civil servant, and an amateur anthropologist and historian who had a broad familiarity with pagan religions, esoteric societies and occultism in general. At the time Gardner called it the "witch cult" and "witchcraft", and referred to its adherents as "the Wica". From the 1960s onward, the name of the religion was normalised to "Wicca".