https://www.theverge.com/2017/9/12/16276062/ios-11-release-date-download-features-iphone-update

Apple’s newest mobile operating system, iOS 11, will be released on September 19th, right alongside the new iPhone 8 and 8 Plus.

We’ve actually known what to expect from iOS 11 for a while now, as Apple originally showed off the mobile OS back in June at the company’s developer conference. It’s one of the biggest upgrades to iOS in years, and all that stuff we already knew about is still here: Siri translations, Apple Pay in iMessage, split screen mode on iPad, drag and drop, ARKit, a brand new control center, Do Not Disturb mode while driving, screen recording — the list goes on.