Anyway, I guess Happy Christmas, or Joyful Christmas doesn't have the same ring to it.
And there is an old-time nostalgia to the perennial greeting of Merry Christmas. But if I, as a self-avowed and practicing Christian, find the debate over saying Merry Christmas a little silly, how do you think all the non-Christians find it? I'd file this under 'Pick your battles wisely'.
Wonderful Incarnation Day to you all.