using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;

public class Program

{

    public static void Main()

    {

        var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

        var start = DateTime.UtcNow.AddDays(-1);

        var end = DateTime.UtcNow.AddDays(1);

        Console.WriteLine(JsonConvert.SerializeObject(DateTime.UtcNow.AddDays(-3), new JavaScriptDateTimeConverter()));

        Console.WriteLine(JsonConvert.SerializeObject(DateTime.UtcNow.AddDays(1), new JavaScriptDateTimeConverter()));

    }

}