Some interesting comic book-related events for this year.
April 18 - 19 Toronto Comicon Fan Appreciation
May 2 Free Comic Book Day
(Seriously, this is one of my favourite days of the year. Do yourself a favour and get out to the local comic store on this day and see what's out there.)
August 28 - 30 Fan Expo Canada
September 27 Word on the Street
Not specifically a comic book event, but Drawn & Quarterly are often there, as well as some independent comic publishers.