using System;
using System.Globalization;


namespace Enum
{
    class Program
    {
        static void Main(string[] args)
        {
            var s = "Tue Feb 18 2014 00:00:00 GMT-0300 (Hora oficial do Brasil)";
            var date = DateTime.ParseExact(s,
                                           "ddd MMM dd yyyy HH:mm:ss 'GMT-0300 (Hora oficial do Brasil)'",
                                           CultureInfo.InvariantCulture);
            Console.WriteLine(date);
        } 
    }
}