When will Apple have its iPhone 18 Pro release event?

Apple obviously knows, and perhaps some of its retail staff have at least a clue, but for the rest of us, here's the best estimate of when the iPhone 18 Pro will be announced.
Mockup of a possible iPhone 18 Pro Max, which is rumored to come in a dark cherry red.
No question, it'll be in September. Apple has held its iPhone launches in October, but since 2011 the only time it has done that was during COVID.The question is when in September we'll find out the all-important updates and, more than e