How to get current day, month, year, day of week/month/year in java

In this tutorial we will see how to get current date, day, month, year, day of week, day of month and day of year in java.

import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;

class Example {

   public static void main(String args[]) {
      Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
      //getTime() returns the current date in default time zone
      Date date = calendar.getTime();
      int day = calendar.get(Calendar.DATE);
      //Note: +1 the month for current month
      int month = calendar.get(Calendar.MONTH) + 1;
      int year = calendar.get(Calendar.YEAR);
      int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
      int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
      int dayOfYear = calendar.get(Calendar.DAY_OF_YEAR);

      System.out.println("Current Date is: " + date);
      System.out.println("Current Day is:: " + day);
      System.out.println("Current Month is:: " + month);
      System.out.println("Current Year is: " + year);
      System.out.println("Current Day of Week is: " + dayOfWeek);
      System.out.println("Current Day of Month is: " + dayOfMonth);
      System.out.println("Current Day of Year is: " + dayOfYear);

   }
}

Output:

Current Date is: Wed Jan 08 20:30:26 IST 2014
Current Day is:: 8
Current Month is:: 1
Current Year is: 2014
Current Day of Week is: 4
Current Day of Month is: 8
Current Day of Year is: 8

In the above example we have fetched the data of local timezone (note: we have used TimeZone.getDefault() in the first statement of the program. However it is also possible to get these details for another TimeZone.

Here is how to do it:

Calendar cal = Calendar.getInstance(TimeZone.getDefault());
//change the timezone: Provide the TimeZone Id as parameter
cal.setTimeZone(TimeZone.getTimeZone("Europe/Athens"));
//get the details in new time zone
System.out.println(cal.get(Calendar.HOUR_OF_DAY));
System.out.println(cal.get(Calendar.WEEK_OF_MONTH));
System.out.println(cal.get(Calendar.WEEK_OF_YEAR));
...

Here Europe/Athens is the Id of a TimeZone. In order to know the all the Ids, run the following code. It would give you all existing Ids which you can use in your program:

for (String string : TimeZone.getAvailableIDs()) {
      System.out.println(string);
}

Output would be like:

Etc/GMT+12
Etc/GMT+11
Pacific/Midway
Pacific/Niue
Pacific/Pago_Pago
Pacific/Samoa
US/Samoa
America/Adak
America/Atka
Etc/GMT+10
HST
....
...

References: