My family has always gotten wall calenders that contain both American and Canadian holidays. For years I remember seeing December 26th as "Boxing Day (Canada)" and thinking that meant instead of celebrating Christmas on the 25th, all Canadians went to a big boxing match on the 26th. I felt sorry for all the Canadian kids because I thought boxing was really boring. I'm still not sure what Boxing Day is, but I know it's not THAT.
A childhood belief about nationalities

others believed things like this
- I thought that Boxing Day had something to do with boxing, like watching a global boxing competition.Anon
- I'm an American, and for a good long while I thought that Boxing Day involved the sport of boxing.— miss Taken
- I am Canadian and when I was little I would sing "True Pastry Love" instead of 'True Patriot Love"— Jess
- Living near Canada's border without cable, I didn't know I was American. — Romania
- I thought Canadians came from Canadia.Anon
- How could Baby Jesus be born on Dec 25th, get tall, grow a beard and then die, all by Easter. Whew!— Joe