Referring to last year’s iPhone 14 event, which took place on September 7, the iPhone 14 models were released just over a week later on September 16, with the iPhone 14 Plus hitting the shelves on October 7. Based on this, September 5 or 12 are strong contenders for the iPhone 15 launch date in 2023 (both being Tuesdays), with September 6 and 13 also in the realm of possibility. As with previous releases, shipping dates are likely to be just over a week after the announcement.
Analyzing past patterns, the iPhone 15 lineup will probably be available for purchase on the Friday of the following week. Thus, if the announcement takes place on September 5 or 6, the release date would likely be September 15. Similarly, an announcement on September 12 or 13 would likely result in a shipping date of September 22.