Apple invites everybody to “California Streaming” special event on September 14 10:00 AM PDT.
Apple is expected to show new iPhones, possibly Apple Watches, maybe iPads. It is also expected that iOS, iPadOS and watchOS release dates will be announced.

iPhone and iPad owners could check cool AR effect with Apple logo with portal to some California location.
Apple Event: California Streaming.
Apple Developer: California streaming.
Add to calendar: Apple Event
Recommendations
Developer:
Watch the event, check new device features.QA engineer:
Business as usual.PM/DM:
Watch the event, check new device features.