Wasn't "Dinner is Swerved" somewhat of a Thanksgiving episode? I don't remember the actual date it aired, but it always felt "Thanksgiving-y" to me, because Bloo was trying so hard (and in vain) go get down to the dining room so he could take part in that giant and delicious meal. And the two movies, GWH and DI developed a tradition of airing specials at Thanksgiving time. Although neither of them really had anything to do with the holiday.
There's some debate on how canon it is, but there was an idea for a Thanksgiving special that Lauren shared on her Facebook page this summer. It was going to be about Frankie's parents and sister and nephew visiting Madame F and her for Thanksgiving. The original discussion about it can be found
here. Perhaps it can still become a reunion special though. We can only hope.
