Apple II system clocks, also known as real-time clocks, were devices in the early years of microcomputing. A clock/calendar did not become standard in the Apple II line of computers until 1986 with the introduction of the Apple IIGS.
In the context of early personal computers, Apple II system timekeeping devices played a significant role. However, it wasn't until 1986 that a built-in clock/calendar became a standard component in the Apple II line with the release of the Apple IIGS.