no, not official; i just have a friend who works there and i asked him. the kennedy center doesn't like to announce the mill. stage schedule too far in advance, in case of cancels. the band's manager (robe master) did set up the show, and i believe it is now safe to call it an "official" event set for oct. 1.
oh my gawd, i'm so excited; how i am even writing this. free show? who else does that around here, and at the kennedy center, no less.