Season Calculator in Java

For those of you where your place don't have four seasons like europe and any other countries have, don't be sad to determine which date of month is the season would be. I'd received this assignment from my lecturer to determine the season according to the date and month.

package calender;
import java.util.*;
public class Calender {

    public static void main(String[] args) {
        int date, month; //declare the variable
        
        //declare the Scanner so that user can store value to memory
        Scanner input = new Scanner(System.in);
        
        //Asking user to enter the date
        System.out.print("Please enter date: ");
        date = input.nextInt();
        
        //Asking user to enter month
        System.out.print("Please enter month: ");
        month = input.nextInt();
        
        //Condition to determine month not more than 13 and day not more than 32
        if (month >= 13 || month < 1 || date > 31 || date <= 0) {
            System.out.println("Please enter a valid date and month");
        } else {
            System.out.print("On "+getMonth(month)+", "+date+" the season ");
            System.out.println("is: "+season(date,month));
            
        }
    }//end main method
    
    public static String getMonth(int z) //Task3 Addition
    {
       //Switching number to string type
        switch(z)
        {
            case 1: 
               return "January";
               
            case 2:
                return "February";
                
            case 3: 
               return "March";
               
            case 4:
                return "April";
                
            case 5: 
               return "May";
               
            case 6:
                return "June";
                
            case 7: 
               return "July";
               
            case 8:
                return "August";
                
            case 9: 
               return "September";
               
            case 10:
                return "October";
                
            case 11: 
               return "November";
               
            case 12:
                return "December";
                
            default:
                return "No Month";
        }
    }//end getMonth method
    
    public static String season(int x, int y) //task2
    {
        String season = null; //Initializing season before statement
      
        //The condition when the season start
        if (((y == 12)&&(x>=16))||((y<=3)&&(x<=15))){
            season = "Winter";
        }          
        else if (((y >= 3)&&(x>=16))||((y<=6)&&(x<=15))){
            season = "Spring";
        }
        else if (((y >= 6)&&(x>=16))||((y<=9)&&(x<=15))){
            season = "Summer";
        } 
        else if (((y >= 9)&&(x>=16))||((y<=12)&&(x<=15))){
            season = "Fall";
        }
        return season;
    }   //end season method
}//end class