How to calculate islamic ramadan date with Java 8

package com.amudabadmus.ramadandate;

import java.time.LocalDate;
import java.time.chrono.HijrahDate;
import java.time.temporal.ChronoField;
import java.time.temporal.TemporalAdjusters;

public class RamadanDate {

    public static void main(String[] args) {

        //first day of Ramadan, 9th month
        HijrahDate ramadan = HijrahDate.now()
                .with(ChronoField.DAY_OF_MONTH, 1).with(ChronoField.MONTH_OF_YEAR, 9);
        System.out.println("HijrahDate : " + ramadan);

        //HijrahDate -> LocalDate
        System.out.println("\n--- Ramandan 2017 ---");
        System.out.println("Start : " + LocalDate.from(ramadan));

        //until the end of the month
        System.out.println("End : " + LocalDate.from(ramadan.with(TemporalAdjusters.lastDayOfMonth())));

    }

}



output

HijrahDate : Hijrah-umalqura AH 1438-09-01

--- Ramandan 2017 ---
Start : 2017-05-27
End : 2017-06-24