The time zone currently used by the system, automatically updating to the user’s current preference.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Xcode 8.0+
If this time zone is mutated, then it no longer tracks the system time zone.
The autoupdating time zone only compares equal to itself.