using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(DateTime.Now.ToString("d"));

        Console.WriteLine(DateTime.Now.ToString("d", new CultureInfo("en-US")));

        Console.WriteLine(DateTime.Now.ToString("d", new CultureInfo("I-do-not-exist")));

        Console.WriteLine(DateTime.Now.ToString("d", new CultureInfo("it-IT")));

    }

}