iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Apple to Live Stream September 9 iPhone Event
Apple will also likely stream the event to the Apple TV with a dedicated channel, as it has done for past events. MacRumors will be providing live coverage of the event as well, both on MacRumors.com and on the MacRumorsLive Twitter account for those unable to watch Apple's live stream.
The September 9 event, which kicks off at 10 a.m. Pacific Time, will be held at the Flint Center at De Anza College in Cupertino, where Apple first unveiled the original Mac 30 years ago. Apple is expected to introduce the iPhone 6 in two separate sizes, its upcoming wearable device, and its payments initiative at the event.