I ran into this website about Canada this morning. I guess there are a few hints here and there that once you have lived in Canada you sort of just take for granted.
But I can laugh because I didn't figure out a few things until way later on.
There is no mail delivered on Saturdays. I think it took me over a year until this really dawned on me!
The Trans-Canada Highway -- Canada's analogue to the US Interstates -- is two lanes wide for most of its length. (Way smaller than I was used to!)
Mortgage interest is not tax-deductible. The interest rate on most mortgages is not fixed, but rather, is renewed at the end of a term which can be as short as six months or as long as seven years. (way different)
Most Canadians will tell you that the last letter of the alphabet is pronounced "zed." Sharon, Lois, and Bram, popular children's entertainers, make it a point in their performances of "The Alphabet Song" to say "zed" instead of "zee." (this one still cracks me up - It's sort of like how Europeans always start counting with their thumb!)