My dad's side of the family is Southern through and through, so the Turkey must be accompanied by dumplings at his mom's house.
On my mom's side, my great grandmother immigrated from Austria Hungary in ~1917, and my grandfather grew up in the ethnic neighborhoods of Bridgeport, CT. A holiday at their house was not complete without pierogies. My family makes them with mashed potatoes, cinnamon, and sharp cheddar. They are then placed in a large vessel with lots of melted butter. Everybody is responsible for their own defribillator paddles.

These are the things that complete the holiday meals in my family. What about yours?
-Pete