Just a quick thought.
It makes me cringe when I hear professing Christians say "Turkey Day." When The World does it, it is because they are ungrateful. It is more important to them to appear cynical, jaded, above-it-all, than to acknowledge that everything they enjoy in life is a gift. They're Bart Simpson, "praying" his prayer, "Dear God, we paid for all this stuff ourselves, so thanks for nothing."
So I understand why non-Christians do it. They do it because they're non-Christians. It is in their nature to be ungrateful (Romans 1:21).
But why do we do it? To be cool? To be accepted? To show how jaded and cynical we are, too?
We really shouldn't.
(Later this same season: I'll take on "Happy Holidays" -- oy!)