Get current timezone (i.e. America/Denver)

    Returns:
        str: Timezone in unix format

    Raises:
        CommandExecutionError: If timezone could not be gathered

    CLI Example:

    .. code-block:: bash

        salt '*' timezone.get_zone

def get_zone():
    '''
    Get current timezone (i.e. America/Denver)

    Returns:
        str: Timezone in unix format

    Raises:
        CommandExecutionError: If timezone could not be gathered

    CLI Example:

    .. code-block:: bash

        salt '*' timezone.get_zone
    '''
    cmd = ['tzutil', '/g']
    res = __salt__['cmd.run_all'](cmd, python_shell=False)
    if res['retcode'] or not res['stdout']:
        raise CommandExecutionError('tzutil encountered an error getting '
                                    'timezone',
                                    info=res)
    return mapper.get_unix(res['stdout'].lower(), 'Unknown')