First Things editor Jody Bottum ponders the meaning (or meaninglessness) of Chrsitmas without Advent:

Still, the disappearance of Advent seems especially disturbing—for it's injured even the secular Christmas season: opening a hole, from Thanksgiving on, that can be filled only with fiercer, madder, and wilder attempts to anticipate Christmas. 

More Christmas trees. More Christmas lights. More tinsel, more tassels, more glitter, more glee—until the glut of candies and carols, ornaments and trimmings, has left almost nothing for Christmas Day. For much of America, Christmas itself arrives nearly as an afterthought: not the fulfillment, but only the end, of the long Yule season that has burned without stop since the stores began their Christmas sales...

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 ...What Advent is, really, is a discipline: a way of forming anticipation and channeling it toward its goal. There's a flicker of rose on the third Sunday—Gaudete!, that day's Mass begins: Rejoice!—but then it's back to the dark purple that is the mark of the season in liturgical churches. And what those somber vestments symbolize is the deeply penitential design of Advent. Nothing we can do earns us the gift of Christmas, any more than Lent earns us Easter. But a season of contrition and sacrifice prepares us to understand and feel something about just how great the gift is when at last the day itself arrives.

More than any other holiday, Christmas seems to need its setting in the church year, for without it we have a diminishment of language, a diminishment of culture, and a diminishment of imagination. The Jesse trees and the Advent calendars, St. Martin's Fast and St. Nicholas' Feast, Gaudete Sunday, the childless crèches, the candle wreaths, the vigil of Christmas Eve: They give a shape to the anticipation of the season. They discipline the ideas and emotions that otherwise would shake themselves to pieces, like a flywheel wobbling wilder and wilder till it finally snaps off its axle...

Click here to read the entire essay.