Here is a complete list of accepted values for the timezone capability:
- GMT
- GMT-01:00
- GMT-02:00
- GMT-03:00
- GMT-03:30
- GMT-04:00
- GMT-05:00
- GMT-06:00
- GMT-07:00
- GMT-08:00
- GMT-09:00
- GMT-10:00
- GMT-11:00
- GMT-12:00
- GMT+01:00
- GMT+02:00
- GMT+03:00
- GMT+03:30
- GMT+04:00
- GMT+04:30
- GMT+05:00
- GMT+05:30
- GMT+05:45
- GMT+06:00
- GMT+06:30
- GMT+07:00
- GMT+08:00
- GMT+09:00
- GMT+09:30
- GMT+10:00
- GMT+11:00
- GMT+12:00
- GMT+13:00