The period designating when Apple’s ninth major release of their mobile operating system, iOS 9, became available to the public is a specific point in time. For example, references to the timing of app updates frequently depend on this moment as a fixed reference.
Knowledge of the designated period offers a stable, consistent point of reference for understanding trends in app development, identifying device compatibility issues, and tracing the adoption rate of new features. Understanding this history provides context for subsequent iOS releases and the evolution of mobile technology.