Apple’s next slew of iPhones will go on sale in September, almost certainly less than four weeks from now. Before then, it’s probably under three weeks before all is revealed at the next keynote. And the soonest development could be as soon as Tuesday, Aug. 26. Here’s your complete guide to what’s coming, including times to the minute.

Apple usually sends out invites in late August, but history and habit suggest this year’s iPhone event will fall on September 9.

The most widely discussed rumor is that Apple might be introducing its slimmest phone ever, the iPhone Air, which may replace the iPhone Plus. This rumored device is said to have a profile thickness of 5.5 mm, making it about 0.08 inches thinner than current iPhones. It’ll also feature a 6.6-inch screen.