Robert Benchley on not-so-Dickensian Christmas afternoons:
In the meantime, we must not forget the children. No one else could. Aunt Libbie said that she didn’t think there was anything like children to make a Christmas; to which Uncle Ray, the one with the Masonic fob, said, “No, thank God.” Although Christmas is supposed to be the season of good cheer, you (or I, for that matter) couldn’t have told, from listening to the little ones, but that it was the children’s Armageddon season, when Nature had decreed that only the fittest should survive, in order that the race might be carried on by the strongest, the most predatory and those possessing the best protective coloring.
Max Beerbohm1 wrote an entire book of parodic Christmas pieces in A Christmas Garland. If you have trouble telling Ch*st*rt*n from B*ll*c, this might help. (There’s an interesting dicussion of Beerbohm here, though it suffers from Too Much Information.)
There’s a discussion of Christmas science fiction here.