Update: There's also a New York Times interview with Jeff Kaplan (AKA Tigole) with additional details, including the possible classes: warrior, priest, paladin, mage, and hunter.
[Thanks, Stephen, Shawn, and Geoffrey for all sending this in!]
|Hallow's End||10/18 - 11/1|
|Day of the Dead||11/1 - 11/3|
|Darkmoon Faire||11/2 - 11/9|
|BlizzCon 2014||11/7 - 11/8|