How to convert Date and Time between Timezone in Java?

TimeZone represents a time zone offset, and also figures out daylight savings.

Typically, we can get a TimeZone using getDefault() method which creates a TimeZone based on the time zone where the application is running. 

For example, if the application is running in India, getDefault() method creates a TimeZone object based on Indian Standard Time (IST).

We can also get a TimeZone using getTimeZone along with a time zone ID. For instance, the time zone ID for the Indian Standard Time (IST) zone is Asia/Calcutta. So, we can get a IST TimeZone object with:

TimeZone timezone = TimeZone.getTimeZone("Asia/Calcutta");

Lets look into the code -

package com.anjan.timezone;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.TimeZone;

public class TimeZoneDemo {

public static String convertDateToTimeZone(Date date, TimeZone timeZoneID, String dateFmt) {

SimpleDateFormat sdf = new SimpleDateFormat(dateFmt);

sdf.setTimeZone(timeZoneID);

return sdf.format(date);

}

public static void main(String arg[]) {

Date date = new Date();

String dt = convertDateToTimeZone(date, TimeZone.getTimeZone("Asia/Calcutta"), "dd-MM-YYYY HH:mm:ss");

System.out.println("Date in Asia/Calcutta : "+dt);

dt = convertDateToTimeZone(date, TimeZone.getTimeZone("America/Los_Angeles"), "dd-MM-YYYY HH:mm:ss");

System.out.println("Date in America/Los_Angeles : "+dt);

}

}

Output -

Date in Asia/Calcutta : 31-08-2017 15:06:30

Date in America/Los_Angeles : 31-08-2017 02:36:30