Working hours unfinished

using System;
using System.ComponentModel.Design;
using System.Globalization;
using System.Reflection;
using System.Security.Cryptography;

namespace SomeExcercises
{
    class Program
    {
        static void Main(string[] args)
        {
            int time = int.Parse(Console.ReadLine());
            string day = Console.ReadLine();

            if (time > 10 && time < 18)
            {
                switch (day)
                {
                    case "Monday":
                    case "Tuesday":
                    case "Wednesday":
                    case "Thursday":
                    case "Friday":
                        Console.WriteLine("open");
                        break;
                    case "Saturday":
                    case "Sunday":
                        Console.WriteLine("closed");
                        break;
                }
            }

            else if (time < 0 || time > 24)
            {

            }
            else
            {
                Console.WriteLine("closed");
            }
        }

    }
}