using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Next(new DateTime(2020, 5, 1), 5).ToString()); 

    }

    public static DateTime Next(this DateTime date, int dayOfWeek) { 

        return date.AddDays((dayOfWeek < (int)date.DayOfWeek ? 7 : 0) + dayOfWeek - (int)date.DayOfWeek); 

    }

}