import java.util.Scanner;
import java.lang.Math;

public class dayOfTheWeek{

    public static final int DAYS_IN_APRIL_JUNE_SEPT_NOV = 30;
    public static final int DAYS_IN_FEB = 28;
    public static final int DAYS_IN_FEB_ON_LEAP_YEAR = 29;
    public static final int DAYS_IN_MONTHS_USUALLY = 31;
    public static final int TOTAL_MONTHS = 12;

    public static String main(String[] args) {

        System.out.println("Enter date (dd/mm/yyyy)");
        Scanner dateScanner = new Scanner(System.in);
        dateScanner.useDelimiter("/");
        int day = dateScanner.nextInt();
        int month = dateScanner.nextInt();
        int year = dateScanner.nextInt();


        public static String numberEnding ( int day){

            String endOfNumber = "";
            switch (day) {
                case 1:
                    return ("st");
                    break;
                case 2:
                    return ("nd");
                    break;
                case 3:
                    return ("rd");
                    break;
                default:
                    return ("nth");
                    break;


            }
        }

        public static String monthName ( int month){

            String aMonth = "";
            switch (month) {
                case 1:
                    return ("January");
                    break;
                case 2:
                    return ("Febrary");
                    break;
                case 3:
                    return ("March");
                    break;
                case 4:
                    return ("April");
                    break;
                case 5:
                    return ("May");
                    break;
                case 6:
                    return ("June");
                    break;
                case 7:
                    return ("July");
                    break;
                case 8:
                    return ("August");
                    break;
                case 9:
                    return ("September");
                    break;
                case 10:
                    return ("October");
                    break;
                case 11:
                    return ("November");
                    break;
                case 12:
                    return ("December");
                    break;
            }


        }
        public static String dayOfTheWeek ( int day, int month, int year)
        {

            String weekday = "";

            if (month == 1 || month == 2) {
                int Y = year - 1;
            } else {
                int Y = year;
            }
            int y = year % 100;

            int c = year;
            while (c >= 100) {
                c /= 10;
            }

            double w = ((day + Math.floor(2.6 * (((month + 9) % 12) + 1) - 0.2) + y + Math.floor(y / 4) + Math.floor(c / 4) - (2 * c)) % 7);
            if (w < 0) {
                w += 7;
            }
            switch ((int) w) {
                case 0:
                    return ("Sunday");
                    break;
                case 1:
                    return ("Monday");
                    break;
                case 2:
                    return ("Tuesday");
                    break;
                case 3:
                    return ("Wednesday");
                    break;
                case 4:
                    return ("Thursday");
                    break;
                case 5:
                    return ("Friday");
                    break;
                case 6:
                    return ("Satuday");
                    break;
            }


        }
        System.out.println(dayOfTheWeek + "" + day + numberEnding + " of " + monthName + year);
    }

}