How to get local time of different time zones?

Question

I want to get local time of different time zones using Java code. Based on the time zone passed to the function I need that time zone's local time. How to achieve this?

score 16 · Accepted Answer · edited Feb 06 '12 at 08:02

16

java.util.TimeZone tz = java.util.TimeZone.getTimeZone("GMT+1");
java.util.Calendar c = java.util.Calendar.getInstance(tz);

System.out.println(c.get(java.util.Calendar.HOUR_OF_DAY)+":"+c.get(java.util.Calendar.MINUTE)+":"+c.get(java.util.Calendar.SECOND));

edited Feb 06 '12 at 08:02

Aliaksei Kliuchnikau

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4
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answered Feb 06 '12 at 06:27

wangwei

196
5

This code failed on me so instead I used cal.add(Calendar.MILLISECOND, rawOffset) and did required timezone calculations myself to be independent from timezone IDs. See @Subhamay answer. – Constantin Zagorsky Aug 04 '20 at 12:24
Echoing @Constain Zagorsky's comment, this solution does give the correct, adjusted HOUR, MINUTE & SECOND - but milliseconds (`c.getTimeInMillis()`) always returns GMT. – Woodchuck Feb 17 '23 at 19:00

score 15 · Answer 2 · answered Feb 06 '12 at 06:21

I'd encourage you to check out Joda Time, an alternative (but very popular) to the standard Java date and time API:

http://joda-time.sourceforge.net/index.html

Using Joda Time, I think this is what you what:

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;

public class TimeZoneDemo {

  public static void main(String[] args) {

    DateTime now = new DateTime(System.currentTimeMillis(), DateTimeZone.forID("UTC"));
    System.out.println("Current time is: " + now);
  }
}

You just need to know the standard ID for the time zone in question, such as UTC.

Thanks for the Response . I am writing a small class and I don't want to import joda package for this small class. Can you suggest any other way ? Thanks again — Raj, Feb 06 '12 at 07:30

score 11 · Answer 3 · edited Sep 04 '16 at 13:42

Java 1.8 provides you with some new classes in package java.time:

package learning.java8;

import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

import org.junit.Test;

public class JavaTimeLT {

    @Test
    public void zonedDataTimeExample() {
        final ZoneId zoneId = ZoneId.of("Europe/Zurich");
        final ZonedDateTime zonedDateTime = ZonedDateTime.ofInstant(Instant.now(), zoneId);
        System.out.println(zonedDateTime.format(DateTimeFormatter.ISO_ZONED_DATE_TIME));
    }
}

score 4 · Answer 4 · answered Feb 06 '12 at 06:21

I wrote the following program to get time for all the Timezones available, see if this helps...

String[] zoneIds = TimeZone.getAvailableIDs();
    for (int i = 0; i < zoneIds.length; i++) {
    TimeZone tz = TimeZone.getTimeZone(zoneIds[i]);
    System.out.print(tz.getID() + " " + tz.getDisplayName());
        Calendar calTZ = new GregorianCalendar(tz);
        calTZ.setTimeInMillis(new Date().getTime());
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.YEAR, calTZ.get(Calendar.YEAR));
        cal.set(Calendar.MONTH, calTZ.get(Calendar.MONTH));
        cal.set(Calendar.DAY_OF_MONTH, calTZ.get(Calendar.DAY_OF_MONTH));
        cal.set(Calendar.HOUR_OF_DAY, calTZ.get(Calendar.HOUR_OF_DAY));
        cal.set(Calendar.MINUTE, calTZ.get(Calendar.MINUTE));
        cal.set(Calendar.SECOND, calTZ.get(Calendar.SECOND));
        cal.set(Calendar.MILLISECOND, calTZ.get(Calendar.MILLISECOND));
    System.out.println( "  "+cal.getTime());

score 3 · Answer 5 · answered Sep 07 '17 at 02:28

3

In Java 8, you can use the ZonedDateTime.now(ZoneId zone) method:

ZonedDateTime zonedDateTime = ZonedDateTime.now(ZoneId.of("Asia/Tokyo"));
LocalTime localTime = zonedDateTime.toLocalTime();

System.out.println(localTime);

answered Sep 07 '17 at 02:28

Robby Cornelissen

91,784
22
134
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score 3 · Answer 6 · answered Mar 20 '12 at 04:52

check this. hope it will help.

    TimeZone tz = TimeZone.getTimeZone("Asia/Shanghai");
    Calendar cal = Calendar.getInstance();

    int LocalOffSethrs = (int) ((cal.getTimeZone().getRawOffset()) *(2.77777778 /10000000));

    int ChinaOffSethrs = (int) ((tz.getRawOffset()) *(2.77777778 /10000000));

    TimeZone tz1 = TimeZone.getTimeZone("US/Central");
    String ss =cal.getTimeZone().getDisplayName();

    System.out.println("Local Time Zone : " + ss);
    System.out.println("China Time : " + tz.getRawOffset());

    System.out.println("Local Offset Time from GMT: " + LocalOffSethrs);
    System.out.println("China Offset Time from GMT: " + ChinaOffSethrs);

    cal.add(Calendar.MILLISECOND,-(cal.getTimeZone().getRawOffset()));
    //cal.add(Calendar.HOUR,- LocalOffSethrs);

    cal.add(Calendar.MILLISECOND, tz.getRawOffset());
    Date dt = new Date(cal.getTimeInMillis());                  
    System.out.println("After adjusting offset Acctual China Time :" + dt);

score 1 · Answer 7 · answered Jan 17 '15 at 00:14

import java.text.SimpleDateFormat;
import java.util.GregorianCalendar;

SimpleDateFormat dateFormat = new SimpleDateFormat();
dateFormat.setTimeZone(TimeZone.getTimeZone("Asia/Seoul"));
GregorianCalendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, 0);

System.out.println(dateFormat.format( cal.getTime()));

How to get local time of different time zones?

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