using System;

public class Program

{

    public static void Main()

    {

        var time = "24:25:30";

        var date = "1/1/2001";

        DateTime parsed = new DateTime();

        if(time.StartsWith("24")){

            time = "00" + time.Substring(2);

        }

        DateTime.TryParse(date + " " + time, out parsed);

        Console.WriteLine(parsed);

    }

}