when will ios 17 come out

The iOS 17 update was released publicly on September 18, 2023. However, for iOS 17's successor iOS 18, the release happened on September 16, 2024. If the question is about the release of iOS 17, it is already out since September 18, 2023. If the question is about the release of the next major iOS version (iOS 18), it was released on September 16, 2024. If the question pertains to iOS 17 related to the upcoming iPhone 17 (which will likely come with iOS 17 or iOS 26 as sometimes happens with new iPhones), the new iPhone 17 series is expected to be announced on September 9, 2025, with iOS 26 (the software that will power the new iPhone) expected around the same time or shortly thereafter.