We've always done the nut thing in our house at Christmas, but we're a family that grows things like macadamia nuts etc, so they're a bit of a year round (seasonal) item too.
That reminds me. I need to get a new nut cracker for this one.
eta: Aden had his first taste of nuts at 5 weeks old if you can believe that. His father and I took my mum to baskin and robins for a sunday, and Kal ordered rocky road icecream in his. I was yabbering at my mum and then happened to glance back and here's Kal feeding our 5 week old his icecream and looking so proud of himself for doing so. Aden seemed as pleased as punch too. I threw a blue fit and told Kal what an idiot he was.
I did that a lot over the next couple of years.