Name: dfC67450 Date: 09/17/98

If we add 11 months to Feb-29-1996 we should obtain Jan-29-1997 but
we obtain Jan-28-1997.

Here is the test demonstrating the bug:
------------- Test.java -----------
import java.util.*;

public class Test {
    public static void main (String args[]){
      GregorianCalendar calendar = new GregorianCalendar(1996, 1, 29);
      System.out.println("init date: " + calendar.getTime());
      System.out.println();

      calendar.add(Calendar.MONTH, 10);
      Date date1 = calendar.getTime();
      int d1 = calendar.get(Calendar.DAY_OF_MONTH);
      System.out.println("after adding 10 months: " + date1);

      calendar = new GregorianCalendar(1996, 1, 29);
      calendar.add(Calendar.MONTH, 11);
      Date date2 = calendar.getTime();
      int d2 = calendar.get(Calendar.DAY_OF_MONTH);
      System.out.println("after adding 11 months: " + date2);

      if (d1 == d2) {
        System.out.println("Test passed");
      } else {
        System.out.println("Test failed");
      }
    }
}
---------Output from the test---------------------
init date: Thu Feb 29 00:00:00 GMT+03:00 1996

after adding 10 months: Sun Dec 29 00:00:00 GMT+03:00 1996
after adding 11 months: Tue Jan 28 00:00:00 GMT+03:00 1997
Test failed
-------------------------------------------------

This bug arised after bug 4165343 has been fixed.

======================================================================