Returns a time zone initialized with a specific number of seconds from GMT.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Xcode 8.0+
The number of seconds from GMT.
A time zone, or
nil if a valid time zone could not be created from
Time zones created with this never have daylight savings and the offset is constant no matter the date. The identifier and abbreviation do NOT follow the POSIX convention (of minutes-west).