We don't have any confirmation on how exact this website's movie listings are, but a theater in Raleigh, NC is listing Equestria Girls: Rainbow Rocks starting at September 27th at 10:30 AM. They show a few more dates going up until October 4th for the movie.
We have seen September as a tentative release in the past, but this is the first exact date. It seems like it matches up pretty well!
Update: And on another note, Harkins is listing the length of the movie at 80 minutes.
Thanks to Ashley for sending it!
