Convert date from one timezone to another

TimezoneConversionExample.java

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;


/**
 *
 * Java program to display a date in different timezone in Java. Internally Java
 * stores date as millisecond passed since 01-01-1970 00:00 GMT, which can be
 * converted and display in any timezone using SimpleDateFormat in Java. In
 * this Java program we will display the same date in two timezones, Indian time (IST)
 * and PST, America/Los_Angeles .
 *
 */
public class TimezoneConversionExample {

    public static void main(String args[]) {
     
        //capturing today's date
        Date today = new Date();
     
        //displaying this date on IST timezone
        DateFormat df = new SimpleDateFormat("dd-MM-yy HH:mm:SS z");
        df.setTimeZone(TimeZone.getTimeZone("Asia/Kolkata"));
        String IST = df.format(today);
        System.out.println("Date in Indian Timezone (IST) : " + IST);
     
        //dispalying date on PST timezone
        df.setTimeZone(TimeZone.getTimeZone("America/Los_Angeles"));
        String PST = df.format(today);
        System.out.println("Date in PST Timezone : " + PST);
 
    }
 
}

// Output:
// Date in Indian Timezone (IST) : 06-11-12 07:39:61 IST
// Date in PST Timezone : 05-11-12 18:09:61 PST