Mein Gott, April is a busy convention month!
If you live in the New York State area, you're gonna be a happy otaku. If you live in New Zealand, you're gonna be a happy otaku. If you live in Calgary... well, you live in Calgary but at least you'll have an anime con' this month!
(Calgary's awesome, by the way. No provincial sales tax and the best beef in the world...)
If you want to see if there are any conventions coming your way, please check out theOtaku.com's Conventionist World and start planning!