using System;

public class Program

{

    public static void Main()

    {

        var timezones = TimeZoneInfo.GetSystemTimeZones();

        var date1 = new DateTime(2021, 4, 2);

        var date2 = new DateTime(2021, 5, 7);

        var totalDays = (date2 - date1).TotalDays;

        Console.WriteLine(totalDays);

        Console.WriteLine(totalDays % 7);

        Console.WriteLine(date2.Month - date1.Month);

        Console.WriteLine(date2.DayOfWeek);

        Console.WriteLine(date2.AddMonths(1));

        Console.WriteLine(date2.AddMonths(1).DayOfWeek);

        Console.WriteLine(DateTime.Now.AddYears(1));

    }

}