I'm a huge Zelda fan but i've never heard of any carnival islands, what are they and whats going on with them???

I believe they were invented by the staff to make the ocean a bit more interesting.

Right now there's nothing going on, but we recently (in June-July) had a tournament there.

Faust is correct. This is a board where we also add some things to the existing Zelda universe (or universes, as it's three combined).

So you'll tell us when something is happening on carnival Island right?

We always notify people of events, of course.