Make the Calander in JAVA

Enter the year and month to see the calander of that month of which year......

import java.util.Scanner;

public class Calendar { 

  

    public static int day(int M, int D, int Y) {

        int y = Y - (14 - M) / 12;

        int x = y + y/4 - y/100 + y/400;

        int m = M + 12 * ((14 - M) / 12) - 2;

        int d = (D + x + (31*m)/12) % 7;

        return d;

    }

    // return true if the given year is a leap year

    public static boolean isLeapYear(int year) {

        if  ((year % 4 == 0) && (year % 100 != 0)) return true;

        if  (year % 400 == 0) return true;

        return false;

    }

    public static void main(String[] args) {

          Scanner s=new Scanner(System.in);

        System.out.println("Enter the year");

      int Y = s.nextInt();    // year

    

System.out.println("Enter the month");

  int M = s.nextInt();    // month (Jan = 1, Dec = 12)

      

        // months[i] = name of month i

        String[] months = {

             "",                               // leave empty so that months[1] = "January"

             "January", "February", "March",

             "April", "May", "June",

             "July", "August", "September",

             "October", "November", "December"

        };

        // days[i] = number of days in month i

        int[] days = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

        // check for leap year

        if (M == 2 && isLeapYear(Y)) days[M] = 29;

        // print calendar header

        System.out.println("   " + months[M] + " " + Y);

        System.out.println(" S  M Tu  W Th  F  S");

        // starting day

        int d = day(M, 1, Y);

        // print the calendar

        for (int i = 0; i < d; i++)

            System.out.print("   ");

        for (int i = 1; i <= days[M]; i++) {

            System.out.printf("%2d ", i);

            if (((i + d) % 7 == 0) || (i == days[M])) System.out.println();

        }

    }

}