Location service timezoneId

Hi, I am calling Location service with address longitude and latitude and time zoneId in response returns null. timeZone object is null. Could you please tell me if this is the correct api to use.

public String getTimeZoneId(double latitude, double longitude) throws Exception {
    String timeZoneId = null;
    SearchPlaceIndexForPositionRequest request = SearchPlaceIndexForPositionRequest.builder()
        .indexName("myPlacesIndex")
        .position(Arrays.asList(longitude, latitude)) // [longitude, latitude]
        .build();

    SearchPlaceIndexForPositionResponse response = locationClient.searchPlaceIndexForPosition(request);
    for (SearchForPositionResult result : response.results()) {
      if (result.place().timeZone() != null) {
        timeZoneId = result.place().timeZone().name();
        break;
      }
    }
return timeZoneId
  }