issue when creating an "if-else" statement

Hi i'm pretty new to java I've been having an issue when I attempt an "if-else" statement. I get syntax errors, which I'm not sure why. Thanks for your input.

 import javax.swing.JOptionPane;

public class MagicDate {

    public static void main(String [] args){

        int month;
        int day;
        int year;
        String input;
        String message = ("This program will find a secret date");

        JOptionPane.showMessageDialog(null, message);

        input = JOptionPane.showInputDialog( " Enter a month of the in numeric "
                                            + "form");
        month= Integer.parseInt(input);

        input = JOptionPane.showInputDialog( " Enter a day of the in numeric"
                                            + " form");
        day= Integer.parseInt(input);

        input = JOptionPane.showInputDialog( " Enter a two digit year");
        year = Integer.parseInt(input);

        if(month * day == year);
        {
            JOptionPane.showMessageDialog(null, "The Date is Magic!");
        }
        else 
        {
            (month * day != year);
            JOptionPane.showMessageDialog(null, "The Date is not Magic");
        }   
        System.exit(0);

    }
}