Found this Nonu it is written by a Christian minister
The Christian season of Christmas actually begins on Christmas Eve and lasts for twelve days, ending on January 6. (No, the twelve-day season of Christmas did not start with the song. It was the other way around.) The time before Christmas is Advent, a season of preparation for Christmas. Christians prepare for celebrating the birth of Jesus by remembering the longing of the Jews for a Messiah. In Advent, we’re reminded of how much we ourselves also need a Savior, and we look forward to our Savior’s second coming even as we prepare to celebrate his first coming at Christmas. The word “Advent” comes from the Latin word adventus, which means “coming” or “visit.” In the season with this name, we keep in mind both “advents” of Christ, the first in Bethlehem and the second yet to come.
So if one is a Christian Advent is a time for religious and spiritual reflection as well as anticipation of the second coming. I guess that is what Soutra was probably referring to.
I am not a Christian but I will decorate my home more in keeping with Yule type celebrations which have been absorbed in to Christian culture. I will decorate on 21 Dec the winter solstice & take it down on 3 Jan as DH b'day on 4th!