Todd Preston's essay in Sott C. Lowe's Christmas anthology is entitled "Putting the 'Yule' Back in 'Yuletide'." This, of course, makes fun of the injunction to "Put Christ Back in Christmas." Preston replies, bit caustically, "First, given the sheer number of plastic nativity scenes, religious Christmas carols, and rebroadcasts of Mel Gibson's Passion of the Christ over the past three months, Christ seems to be very much in evidence this time of year. More to the point, if this directive signals a desire to return to a more 'authentic celebration of Christmas, the key should not be in promoting the Christian aspect, but on balancing the Christian and non-Christian elements of the holiday."
Preston then does a fine job of explicating the history of Christmas as a feast day and holiday celebration, especially in the English-speaking world.