My Christian denomination, along with some others, celebrates the time between January 6 and Ash Wednesday as the season of Epiphany. In common use an epiphany is a sudden moment of awareness — an "ah ha" moment. Etymologically, an epiphany is a shining (“-pha’’-) forth (“epi-“), a manifestation of light. In Christian tradition, this shining forth is the coming of Jesus into the world, a coming through which we all may shine.
In many ways, I view Epiphany as paramount in the Advent Season. This is the date when Jesus is recognized and heralded as King of the Jews through the actions and recognition of pagans.