John Paczkowski, writing for BuzzFeed News:
Sources familiar with Apple’s plans tell BuzzFeed News the company intends to hold a special event the week of Sept. 7, with Wednesday the 9th being the most likely date. […] Sources say Apple executives are likely to show off the company’s latest iPads as well, though that 12.9-inch “iPad Pro” seems to be a wildcard, still.
The day before this rumor broke, I suggested on Twitter that Apple would likely be announcing new iPhones on September 8 with a release date of September 18. I was pretty close. But I wasn’t expecting Apple to announce new iPads until October.