In Christianity, the 12 Existence of Christmas begin on Dec 25, Jesus's day of actual, and end on Epiphany. The Banquet of Epiphany is a Christian local holiday day that celebrates the come upon of God the Son as a human animal in Jesus Christ. It is supposed to be the day the Magi finally reached Bethlehem and visited the newborn Jesus.
A choice of depend on that the damage of days for celebrating the excitement of Christmas was deliberate. By making the 12 Existence of Christmas companionable to the 12 Nights of Yuletide, pagans were nimble to transition in vogue the celebration of Christmas and would so amendment to Christianity addition effortlessly.
But why begin December 25 if Distant Solstice/Yule occurs on or about Dec 21? I option roughly this in the development post.