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Showing content from https://www.tutorialspoint.com/java/util/simpletimezone_observesdaylighttime.htm below:

Java SimpleTimeZone observesDaylightTime() Method

The Java SimpleTimeZone observesDaylightTime(Date date) method is used to query if the given date observes daylight saving time.

Following is the declaration for java.util.SimpleTimeZone.observesDaylightTime() method.

public boolean observesDaylightTime(Date date)

date − This is the given Date.

The method call returns true if this SimpleTimeZone observes Daylight Saving Time; false otherwise.

NA

The following example shows the usage of Java SimpleTimeZone observesDaylightTime(Date) method to check if a given date observes daylight saving time. We've created a SimpleTimeZone using GMT and a date using Date object with current time. Then we've checked date if it observes daylight savings using observesDaylightTime() ethod and printed the status.

package com.tutorialspoint;

import java.time.Instant;
import java.util.Date;
import java.util.SimpleTimeZone;

public class SimpleTimeZoneDemo {
   public static void main( String args[] ) {
      
      // create simple time zone object     
      SimpleTimeZone stobj1 = new SimpleTimeZone(820,"GMT");

      // create date
      Date date = Date.from(Instant.now());

      // check day light
      boolean daylight = stobj1.observesDaylightTime(date); 

      // checking the value of day light      
      System.out.println("Is in day light : " + daylight);
   }     
}

Let us compile and run the above program, this will produce the following result.

Is in day light : false

The following example shows the usage of Java SimpleTimeZone observesDaylightTime(Date) method to check if a given date observes daylight saving time. We've created a SimpleTimeZone using US and a date using Date object with current time. Then we've checked date if it observes daylight savings using observesDaylightTime() ethod and printed the status.

package com.tutorialspoint;

import java.time.Instant;
import java.util.Date;
import java.util.SimpleTimeZone;

public class SimpleTimeZoneDemo {
   public static void main( String args[] ) {
      
      // create simple time zone object     
      SimpleTimeZone stobj1 = new SimpleTimeZone(820,"US");

      // create date
      Date date = Date.from(Instant.now());

      // check day light
      boolean daylight = stobj1.observesDaylightTime(date); 

      // checking the value of day light      
      System.out.println("Is in day light : " + daylight);
   }     
}

Let us compile and run the above program, this will produce the following result.

Is in day light : false

The following example shows the usage of Java SimpleTimeZone observesDaylightTime(Date) method to check if a given date observes daylight saving time. We've created a SimpleTimeZone using BST and a date using Date object with current time. Then we've checked date if it observes daylight savings using observesDaylightTime() ethod and printed the status.

package com.tutorialspoint;

import java.time.Instant;
import java.util.Date;
import java.util.SimpleTimeZone;

public class SimpleTimeZoneDemo {
   public static void main( String args[] ) {
      
      // create simple time zone object     
      SimpleTimeZone stobj1 = new SimpleTimeZone(820,"BST");

      // create date
      Date date = Date.from(Instant.now());

      // check day light
      boolean daylight = stobj1.observesDaylightTime(date); 

      // checking the value of day light      
      System.out.println("Is in day light : " + daylight);
   }     
}

Let us compile and run the above program, this will produce the following result.

Is in day light : false

java_util_simpletimezone.htm

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