using System;

public class Program

{

    public static void Main()

    {

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

        var res = dt.AddMilliseconds(1492171365727); //  1492171365727 = Date.now()

        Console.WriteLine(res);

    }

}