SillyDate

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace SillyDate
{
    class Program
    {
        static void Main(string[] args)
        {
            var dateData = new Dictionary<string, int>
            {
                {"year", DateTime.Now.Year},
                {"month", DateTime.Now.Month},
                {"day", DateTime.Now.Day}
            };
            var serializeObject = JsonConvert.SerializeObject(dateData);
            Console.WriteLine(serializeObject);
            var dict = new Dictionary<string, string>()
            {
                {"dateData",System.Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(serializeObject))}
            };
            Console.WriteLine(JsonConvert.SerializeObject(dict));
            Console.ReadLine();
        }
    }
}