In the world of Apple, nothing's ever 100% certain until it's actually announced, but as things stand we're expecting the iOS 7-running iPhone 5S and iPhone 5C to be announced on September 10, and to go on sale 10 days later.
However, you won't have to wait that long for iOS 7 itself to emerge – in fact, Apple's latest mobile OS looks set to be rolled out the very same day it's announced.
The evidence comes by way of an email to a developer from voice recognition software firm Nuance (the company responsible for Siri), which reads: “as you are probably aware, iOS 7 GA will be released on September 10.”
If Nuance does have its facts straight, it would mark a change from what we saw with last year's release of iOS 6, when the OS started rolling out a week after the iPhone 5 event.
And considering the consistent rumours of delays that have dogged the development of the latest “flatter” version of iOS, a same-day rollout would mark a bit of a turnaround – especially since the iOS 7 Gold Master release is only expected to turn up on September 5.
So maybe it's best not to place too much stock in Nuance's claims for now until something more official emerges.