The Winter Solstice or Yule is also the shortest day of the year, and hence – the longest night. This year it takes place on December 21st. various other names for the Winter Solstice include Midwinter, Yuletide (the Teutonic version), Alban Arthan (Caledonii Tradition, or the Druids), Feill Fionnain (Pecti-Wita Tradition, which falls on December 22nd). Yuletide lasts from December 20th through December 31st. It begins on “Mother Night” and ends twelve days later, on “Yule Night”, hence the “Twelve Days of Christmas” tradition.
Some other names for this Sabbat that are used less commonly are Sun Return, Pagan New Year, Saturnalia (Roman), Great Day of the Cauldron, and Festival of Sol.

Yule is a time of the Goddess of the Cold Darkness and the birth of the Divine Child, the reborn Sun God. It is a time of renewal and rebirth during Winter and the turning of the Earth force tides. A time when the waxing Sun overcomes the waning Sun. In some traditions, this is symbolized by the struggle between the Oak King and the Holly King.
The Winter Solstice had been associated with the birth of a “Divine King” long before the rise of Christianity. Yule is about renewal, re-birth, returning hope and life. It has never truly changed its meaning, as many of the Pagan Gods and Heroes were born at this time: Apollo, Dionysus, Horus, Mithra, and so on.