code: public String sunsetTime(){
  		if(this.datapoint.containsKey("sunsetTime")){
  			DateFormat dfm = new SimpleDateFormat("HH:mm:ss");
  			dfm.setTimeZone(TimeZone.getTimeZone(timezone));
  			String time = dfm.format( Long.parseLong(String.valueOf(this.datapoint.get("sunsetTime"))) * 1000 );
  			return time;
  		}
  		else
  			return "no data";
  	}
docs: Returns the sunrise time for the given day.
  For more information refer to the API Docs:
  <a href="https://developer.forecast.io">https://developer.forecast.io</a>
  @return An human-readable time string formated as [HH:mm:ss]. Returns "no data" if the field is not defined.