You can find poetry in your everyday life, your memory, in what people say on the bus, in the news, or just what's in your heart.
If I felt, in the event of a royal wedding, inspired to write about people coming together in marriage or civil partnership, I would just be grateful to have an idea for the poem. And if I didn't, I'd ignore it.
Christmas is taken very seriously in this household. I believe in Father Christmas, and there's no way I'd do anything to undermine that belief.