Mallard Fillmore spends almost every day of the year being a hateful prick who is the antithesis of what Christ and Christianity stand for ("love thy neighbor as thyself").
So enjoy today when he blandly quotes the Gospel according to Luke, wishes you a happy Christmas, and shows himself reading a book which we are supposed to believe is The Bible, but is more likely Atlas Shrugged, in anticipation of going back to hating everyone but the 1% tomorrow.
In a more general sense, Merry Christmas, Happy Hanukkah, Joyous Kwanzaa, or Happy Holidays. Choose one. (But if you make the wrong choice, immediately declare War on Christmas.)