docs: def jsLocal(self, time_zone=''):
  
          ''' a method to report a javascript string from a labDT object
  
          :param time_zone: [optional] string with timezone to report in
          :return: string with date and time info
          '''
  
      # validate inputs
          js_format = '%a %b %d %Y %H:%M:%S GMT%z (%Z)'
          title = 'Timezone input for labDT.jsLocal'
          get_tz = get_localzone()
          if time_zone:
              # if time_zone.lower() in ('utc', 'uct', 'universal', 'zulu'):
              #     raise ValueError('time_zone cannot be UTC. %s requires a local timezone value. Try:\nfor tz in pytz.all_timezones:\n  print tz' % title)
              try:
                  get_tz = tz.gettz(time_zone)
              except:
                  raise ValueError('\n%s is not a valid timezone format. Try:\nfor tz in pytz.all_timezones:\n  print tz' % title)
  
      # construct javascript datetime from labDT
          dtLocal = self.astimezone(get_tz)
          return format(dtLocal, js_format)