They usually hold a big fireworks display for Canada Day down by the beach in my city. The beach itself isn't that great, and I'm fairly certain Lake Ontario has reached mutation-enabling levels of toxicity, but the fireworks are usually pretty and they hold a carnival of sorts. They usually have a few stages setup and they basically shut down most of the city because everyone heads down there.
Oh, they also hold a Marijuana Day or something. I'm not sure exactly, because I've never gone to it (crazy stoners! lol420), but the police don't seem to care and they just make sure they keep it separate. Maybe I'll mosey on over heh heh.
So what are your plans? Copious amounts of liquor? Roman Candle re-enactments?