Set timezone via addon by antonlacon · Pull Request #322 · LibreELEC/service.libreelec.settings
Initial implementation for selecting the OS's timezone via the settings addon. While it won't cause harm today, it's not intended to be merged…
github.com
The timezone list doesn't include deprecated / repeat entries for the same timezone.
Some timezones is not possible to select anymore. Actually lot of timezones can't be selected because they are not available anymore. Little too much was filtered out.