iPhone publishing cycle was severely disrupted by the pandemic, as was seen in 2020. Apple then divided the 12-series phones into two groups that went on sale on different dates, and the phones' release date itself was significantly delayed. The year 2021 brings a return to the standard plans of the American company. As announced, all phones from the iPhone 13 series will go on sale on the same day.
The latest information that has hit the Internet probably by accident indicates the official start of sales of the iPhone 13 series phones on 17th of September. Clearly, Apple will want to present its phones earlier at a specially scheduled event. So it seems that the probable date for organizing this event will be 7th or 14th of September. Along with the new iPhones, new earphones from the AirPods series will also be available for sale. The leak also indicated a potential date for their in-store launch. It will probably be 30th of September.