ARRAY 1D - 2010 Validate Date

import java.util.*;

class ValidDate2

{

    public static void main(String arg[])

    {

    int a[ ]={31,28,31,30,31,30,31,31,30,31,30,31};

    String day[ ]={"","JANUARY","FEBRUARY","MARCH","APRIL","MAY","JUNE","JULY","AUGUST","SEPTEMBER","OCTOBER","NOVEMBER","DECEMBER"};

    String rd="";

    int d,m,y,n,i;

    Scanner br =new Scanner(System.in);

    System.out.println("Enter date in six digit format eg 141296 : ");

    n=br.nextInt( );

    y=n%100;

    n=n/100;

    m=n%100;

    d=n/100;

    if(y%4==0) a[1]=29;

    if(m>12 || d>a[m-1])

        System.out.println("INVALID DATE");

        else

        {

            if(d==1 || d==21 || d==31) rd="st";

            else if(d==2 || d==22) rd="nd";

            else if(d==3 || d==23)  rd="rd";

            else rd="th";

            System.out.println(d + rd + " " + day[m] + ", " + y);

            System.out.println("VALID DATE");

        }

    }

}