using System;

public class Program

{

    public static void Main()

    {

        DateTime endDate = new DateTime(2020,9,17).AddHours(23);

        DateTime startDate = new DateTime(2020,9,3);

        string c= string.Format(">{0:yyyy-MM-dd HH:mm}", startDate));

        DateTime somedate = startDate.AddHours(-24);

            Console.WriteLine(startDate);

        Console.WriteLine(startDate);

    }

}