Here it is, guys, straight from the Official_PAX Twitter feed. In a reply to a fan asking about the PAX Prime dates, here’s what the guys from Penny Arcade said,

August 31st through September 2nd. Cheers!

And if that wasn’t enough, here’s another reply to another fan,

We haven’t launched for PAX Prime 2012 yet, however Prime will be over labor day weekend.

Looks like it’s official for Labor Day weekend, which sucks for us Portland folks because it falls on the same weekend as Kumoricon. Now we have to split our resources!