Function timezone

timezone(json?): void
Sets active time zone.

Note that the timezone GMT offset will automatically change throughout the year as DST becomes active.

Changing the timezone allows you to experience trip events as if you are operating in the selected timezone independent of the local computer UTC offset.
Parameters
- json: {
  zone: string;
  } = ...
  - zone: string
    string the name of timezone to activate
Returns void
Example
```
// set the timezone to Pacific time 
{"zone":"America/Los_Angeles"}

// set the timezone to UTC  
{"zone":"UTC"}
```