Guess the Seasons task C#

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            string month = Console.ReadLine();
            int date = int.Parse(Console.ReadLine());
            string season = string.Empty;



            switch (month)
            {
                case "January":
                case "February":
                case "March":
                    if (date >= 1 && 19 >= date)
                    {
                        season = "Winter";
                    }
                    else if (date >= 20 && date <= 31)
                    {
                        season = "Spring";
                    }
                    break;

                case "April":
                case "May":
                case "June":
                    if (date >= 1 && 20 >= date)
                    {
                        season = "Spring";
                    }
                    else if (date >= 21 && date <= 30)
                    {
                        season = "Summer";
                    }
                    break;

                case "July":
                case "August":
                case "September":
                    if (date >= 1 && 21 >= date)
                    {
                        season = "Summer";
                    }
                    else if (date >= 22 && date <= 31)
                    {
                        season = "Autumn";
                    }
                    break;

                case "October":
                case "November":
                case "December":
                    if (date >= 1 && 20 >= date)
                    {
                        season = "Autumn";
                    }
                    else if (date >= 21 && date <= 31)
                    {
                        season = "Winter";
                    }
                    break;
            }
            Console.WriteLine(season);



        }
    }
}