Okay, I'll take Week 1...
Is there anything in your culture or area that would confuse outsiders or that doesn't fit what would be considered the norm? This is wide open to anything, from food combinations to driving habits. Whatever may take others by surprise.
I know I have mentioned fans of the Saskatchewan Roughriders wearing watermelon helmets before.
From the US, I would say, dipping pizza crusts in ranch dressing (something I had never seen, considered, or tried before watching people in the US do it. (It is common enough here, that if you order pizza, you can often order a side of ranch dressing to go with it.) Maybe I just led a sheltered life in Saskatchewan???
The Hokey Pokey
Polk-a-roo
Both took a lot of explaining when accidentally mentioned in a group of non-North Americans (Polk-a-roo got even the Americans).
I may have mentioned this before, but I've been known to say "But that's how we say/spell/do it in Canada" when I make a mistake. People generally are not sure if I'm lying or not
