Yule is one of the Quarter Sabbats and is a Sun and fire festival.
This is the longest night of the year, known as Solstice Night, Winter Solstice or The Festival of lights, it is the first official day of winter and from this day until Mid-Summer or Litha, the days will grow longer, banishing the darkness and bringing the light that brings warmth and life to the land and all that dwell there.
According to old folk customs, hanging holly over doorways or windows will ward off any evil spirits who dared to try and enter, lest they be snagged on its sharp, prickly leaves. Bonfires were lit in the fields, and crops and trees were "wassailed" with toasts of spiced cider to bring forth new growth. The evergreen tree has also been central to this season since ancient times, considered sacred because it is immortal, evergreen. The wreath of evergreen symbolizes the ever- turning wheel, the endless circle, and the unending nature of life. The Winter Solstice had been associated with the birth of a "Divine King" long before the rise of Christianity. Many pre- Christian cultures had tales of Gods and heroes whose births to a Mother Goddess bear striking similarities to the later
story of the birth of Jesus. Pagan celebrations in this season of the return of the Light were so popular and pervasive that in later times, this highly popular festival became Christianized as Christmas, the birth of the Son.
Unless the gospels are wrong, it is highly unlikely that Jesus actually was born in December, for one thing, shepherds and their flocks would not have been out in the fields at midwinter. But no matter, the symbolism of Winter Solstice is so completely fitting, that the December 25 "birthday" prevailed.
Whether one celebrates the birth of the Son of Mary, or the birth of the newborn Sun to the Mother Goddess, or the return of new Light in any other tradition, the core meaning is much the same, harmony is held between everyone, and all are focused on celebration, family, feasting, honoring the Ancestors, making holy oaths, and peace.
Yule can be a very special celebration shared with family and friends of varied spiritual paths. With the passing away of the longest day of darkness followed by the birth of the Child of Light come joy, hope and the promise of new life, a new beginning.

For me, I focus on the rebirth of the Sun God, with him comes the promise of rebirth here on earth, not only in the land, but also within myself. I remember to rejoice in the discovery of light and new beginnings as I start my new goals on this first spoke of the wheel!

(this Lore is a mix of Yule Lores I had found on the net for a ritual I wrote, too many to remember for the list of credits)