using System;

public class Program

{

    public static void Main()

    {

        Console.Write(Newtonsoft.Json.JsonConvert.SerializeObject(new DateTime(2086, 12, 21),

                    new Newtonsoft.Json.JsonSerializerSettings{

                        DateFormatHandling = Newtonsoft.Json.DateFormatHandling.MicrosoftDateFormat,

                        DateTimeZoneHandling = Newtonsoft.Json.DateTimeZoneHandling.Utc

                    }));

    }

}