Someone

import java.util.*;

public class Day
{
  public static void main ( String[] args)
  {
    Scanner sc = new Scanner (System.in);
	System.out.print ("Enter the day: ");
	int b = sc.nextInt();
	if ((b < 1) || (b > 31))
	{
	  System.out.println ("Out of Range");
	  System.exit(0);
	}
	System.out.print ("Enter the month: ");
	int e = sc.nextInt();
	if ((e < 1) || (e > 12))
	{
	  System.out.println ("Out of Range");
	  System.exit(0);
	}
	System.out.print ("Enter the year: ");
	int f = sc.nextInt();
	if ((f < 1900) || (f > 2100))
	{
	  System.out.println ("Out of Range");
	  System.exit(0);
	}
	// Takes the users responses and establishes the parameters  for allowable day, month and year inputs.
	
	int a = 0;
	int q = 0;
	if (e >= 3)
	{
   	  a = (e - 2);
	  q = f;
	}
	else
	{
	  a = (e + 10);
	  q = (f - 1);
	}
	//alters the month into the March = 1 etc format
	
	int c = q % 100;
	int d = q / 100;
	int w = (13 * a - 1 ) / 5;
	int x = c / 4;
	int y = d / 4;
	int z = w + x + y + b + c - 2 * d;
	int r = z % 7;
	r = (r + 7) % 7;
	// calculates the value for the day of the week based on input values
	
	String day;
	switch (r)
	{
	  case 0: day = "Sunday"; break;
	  case 1: day = "Monday"; break;
	  case 2: day = "Tuesday"; break;
	  case 3: day = "Wednesday"; break;
	  case 4: day = "Thursday"; break;
	  case 5: day = "Friday"; break;
	  case 6: day = "Saturday"; break;
	  default: day = "nonexistant"; break;
	//changes the numeric value into the string for the day of the week
	
	}
	if (q >=2008)
	{
      System.out.println ("\nThat day will be " + day);
	}
	else
	{
	  System.out.println ("\nThat day was " + day);
	}
	//prints out the gramatically correct dau of the week
  }
}