using System;

using System.Threading.Tasks;

class Program

{

    static async Task Main(string[] args)

    {

        var d = DateTime.Parse("2021-03-03T20:23:24+00:00");

        var y = DateTime.Parse("2021-03-03T12:23:24-08:00");

        Console.WriteLine(d == y);

    }

}

​