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Tip of the Day
Language: Java
Expertise: Intermediate
Apr 13, 2018

Does Your Timezone Support Daylight Saving Time?

You may want to know if your timezone supports Daylight Saving Time programmatically. This can be easily determined with the code below:

Listing 1. Sample Code

import java.util.TimeZone;

public class DaylightSavingsTime
   public static void main(String args[])
      DaylightSavingsTime daylightSavingsTime = new DaylightSavingsTime();
   private void proceed()
      TimeZone tz = TimeZone.getDefault();
      //Uncomment the below line to use the timezone of your choice. Repalce "America/Los_Angeles" with your timezone id.
      //TimeZone tz = TimeZone.getTimeZone("America/Los_Angeles");
      //This returns the ID of the time zone used
      System.out.println("tz.getID(): " + tz.getID());
      //The display name of the ID
      System.out.println("tz.getDisplayName(): " + tz.getDisplayName());
      //This returns true if the time zone uses Daylight Savings Time
      System.out.println("tz.getDSTSavings(): " + tz.getDSTSavings());
      //This returns true if the time zone is currently using Daylight Savings Time
      System.out.println("tz.useDaylightTime(): " + tz.useDaylightTime());
M S Sridhar
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