Your halls are nicely decked. So are all the railings and risers to each floor. Cabinets are decked, the doorway looks fabulous and even the deck is decked. You feel like you’ve been… yeah, well, just rest now, and fa la la la la while you read “Christmas: A Biography” by Judith Flanders to find out why. Oh, how your family loves tradition. The same ornaments are hung, the same songs are played, the same dishes made because that’s Christmas.