If you're planning to attend Blizzard's annual BlizzCon event from October 21-22, the first batch of tickets go on sale Saturday, May 21st. BlizzCon tickets have a tendency to sell out rather quickly, so if you plan on attending the event, you might want to be make a grab for those tickets when they go on sale this Saturday at 10:00am PT.

If you miss out on the first batch, a second batch will go on sale Wednesday, May 25th at 7:00pm PT. Regular tickets cost $175 with a limited number of optional pre-BlizzCon benefit dinner tickets at the cost of $500 and on sale starting Saturday, May 28th at 10:00am PT. Proceeds from the benefit dinner will benefit the Children's Hospital of Orange County.

Source: BlizzCon website