Java TimeZone inDaylightTime() Method

Description

The Java TimeZone inDaylightTime(Date date) method is used to query if the given date is in daylight savings time in this time zone.

Declaration

Following is the declaration for java.util.TimeZone.inDaylightTime() method.

public abstract boolean inDaylightTime(Date date)

Parameters

date − This is the given Date

Return Value

The method call returns true if the given date is in daylight savings time, false, otherwise.

Exception

NA

Checking a GMT TimeZone to be in DayLight Saving Time Example

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

package com.tutorialspoint;

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

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

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

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

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

Output

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

Is in day light : false

Checking a US TimeZone to be in DayLight Saving Time Example

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

package com.tutorialspoint;

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

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

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

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

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

Output

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

Is in day light : false

Checking a BST TimeZone to be in DayLight Saving Time Example

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

package com.tutorialspoint;

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

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

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

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

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

Output

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

Is in day light : false