The only thing that comes to mind is that we normally have Turkey for Christmas dinner, which I don't think is common in the US.
Some folks do turkey in the US, but it's one option among many possible "giant hunks of meat you throw in the oven for hours" rather than the thing that's traditional for everyone. Given how often people roast whole turkeys in the USA outside of the final six weeks of the year... it is kinda common in a relative sense.
If I had to hazard a guess, I might even call it the second most-common entree after ham (especially if you don't lump the various cuts of beef together), but I don't actually have any solid numbers on that.
One of these years it might be fun to go old-school traditional and roast a goose.
A lot of people here eat ham on Christmas. Personally, I think a beef tenderloin or roast would make a good Christmas dinner.
