Apple released the seventh beta of iOS 13 today, and that release contained image files that seem to indicate that Apple will hold its next big iPhone unveiling event on September 10, 2019.

A screenshot of iOS in the beta labeled "HoldForRelease" was originally found by iHelpBR but shared on MacRumors and elsewhere. The image includes an iOS Calendar app icon that says September 10 on it. A similar screenshot was found saying September 12 shortly before Apple's iPhone unveiling event last year. That event was held on—you guessed it—September 12. Also this time around, versions of the image with the date on them were found depicting both the iPhone and iPad interfaces.

Of course, this date was likely anyway. The current incarnation of Apple almost always holds its iPhone event around the same time each September. The event is commonly in the second week of September and usually on a Tuesday. Last year's event was on a Wednesday presumably because the Tuesday fell on September 11. (It was Tuesday, September 12 in 2017.)

Apple is expected to reveal three new iPhones at the event, along with a new Apple Watch. There have also been rumors from the supply chain about an impending 16-inch redesign of the MacBook Pro, though the sourcing on those rumors is not strong enough to report what's coming with any certainty.

We'll also see the first public releases of iOS 13 and macOS Catalina in the weeks following the event. Apple has generally released its new operating systems shortly after the event and shortly before the devices actually ship. Thus, mid-September is likely for iOS 13's release.

iOS 13 will introduce Dark Mode—previously seen in macOS Mojave—to iPhones and iPads, and it will spin the iPad operating system into a new branch called iPadOS. Its numerous improvements will include multitasking, external storage support, and more. The Reminders app is also set to get a long-needed overhaul, and there will be some notable changes to the Maps app as well.

As always, Ars will report on all these developments as they hit. That includes a liveblog on September 10 that should be the final date of the event.