Blizzard has defied convention and announced dates earlier than usual for BlizzCon 2011. The gathering will take place on the 21st and 22nd of October at the Anaheim Convention Center in California.

BlizzCon is a celebration of all things Blizzard and the company’s primary platform for announcements and revelations regarding its blockbuster franchises Warcraft, StarCraft and Diablo.

Ticket sales haven’t been announced but they usually sell out within seconds of becoming available, so if you happen to know you’ll be in California in October, or if you’re considering heading to the event, watch this space closely.