using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        string res = DateTime.ParseExact("Friday, December 19, 201421:00:44:987", "dddd, MMMM d, yyyyHH:mm:ss:fff", CultureInfo.InvariantCulture).ToShortDateString(); 

        Console.WriteLine(res);

    }

}