Loop programming exercise. Need review of my solution.

[Inky pinkie]

Currently studying loops in Java. I have made a solution to a programming exercise, it works, but generally when I do something large I tend to make it more complex and messy than it is needed. Maybe you can help me find better solutions?

The problem:

Write a program that prompts the user to enter the year and first day of the year and displays the calendar table for the year on the console. For example, if the user entered the year 2005, and 6 for Saturday, January 1, 2005, your program should display the calendar for each month in the year, as follows:

        January 2005
---------------------------
Sun Mon Tue Wed Thu Fri Sat
                         1
 2   3   4   5   6   7   8
 9  10  11  12  13  14  15
16  17  18  19  20  21  22
23  24  25  26  27  28  29
30  31

My program:

/** The program prompts the user to enter the year and first day of the year
 *  and displays the calendar table for the year on the console.
 */

package chapter4;

import java.util.Scanner;

public class DisplayCalendar {

	public static void main(String[] args) {

		//Create Scanner
		Scanner input = new Scanner(System.in);
		
		//Prompt the user to enter a year
		System.out.print("Enter a year: ");
		int year = input.nextInt();
		//Prompt the user to enter a first day of the year
		System.out.print("Enter first day of the year: ");
		String firstDayOfYearString = input.next();
		
		int firstDayOfMonth = -1;
		//Find a number of the first day
		switch (firstDayOfYearString) {
			case "Sunday"    : firstDayOfMonth = 0; break;
			case "Monday"    : firstDayOfMonth = 1; break;
			case "Tuesday"   : firstDayOfMonth = 2; break;
			case "Wednesday" : firstDayOfMonth = 3; break;
			case "Thursday"  : firstDayOfMonth = 4; break;
			case "Friday"    : firstDayOfMonth = 5; break;
			case "Saturday"  : firstDayOfMonth = 6; break;
			default : System.out.println("Error: there is no such day of week");
					  System.exit(0);
		}
		
		//Whether the year is a leap year
		boolean isLeapYear = (year % 4 == 0) ^ (year % 100 == 0) || (year % 400 == 0);
		
		
		//Display the calendar
		for (int month = 1; month <= 12; month++) {
		
			//Proper spacing between months
			if (firstDayOfMonth == 0)
				System.out.print("\n");
			else
				System.out.print("\n\n");
			
			//Get name of the month
			String monthString = "";
			switch (month) {
				case 1  : monthString = "January"; break;
				case 2  : monthString = "February"; break;
				case 3  : monthString = "March"; break;
				case 4  : monthString = "April"; break;
				case 5  : monthString = "May"; break;
				case 6  : monthString = "Jule"; break;
				case 7  : monthString = "July"; break;
				case 8  : monthString = "August"; break;
				case 9  : monthString = "September"; break;
				case 10 : monthString = "October"; break;
				case 11 : monthString = "November"; break;
				case 12 : monthString = "December"; break;
			}
		
		
			//Display the heading of the month
			System.out.println("        " + monthString + " " + year);
			System.out.println("---------------------------");
			System.out.println("Sun Mon Tue Wed Thu Fri Sat");
		
			//Find the length of the month
			int length = 30 + ((month + (int)(month / 8.0)) % 2);
			if (month == 2) //Adjust February length
				if (isLeapYear)
					length -= 1; //Leap year
				else
					length -= 2; //Non-leap year
		
			int counter = 1; //Counter to determine end of the week
			
			//Display blank space before first day
			for (int i = 0; i < firstDayOfMonth; i++) {
				System.out.print("    ");
				counter++;
			}
			
			//Display days
			for (int day = 1; day <= length; day++) {
				System.out.printf("%2d", day);
				System.out.print((counter++ % 7 != 0) ? "  " : "\n");
			}
			
			//Determine the first day of the next month
			firstDayOfMonth = (firstDayOfMonth + length) % 7;
			
		}
		
	}

}