using System;

public class Program

{

    public static void Main()

    {

        var hoy = DateTime.Now;

        var lunes = new DateTime(2021,10,31);

        Console.WriteLine("Hoy: " + ((int)hoy.DayOfWeek).ToString());

        Console.WriteLine("Lunes: " + ((int)lunes.DayOfWeek).ToString());

    }

}