using System;

using System.Globalization;

using TimeZoneConverter;

public class Program

{

    public static void Main()

    {

        DateTime date = DateTime.Parse("2023-09-19T23:00:00Z", CultureInfo.CurrentCulture, DateTimeStyles.AdjustToUniversal);

        string format = "dd.MM.yyyy";

        TimeZoneInfo timezoneInfo = TZConvert.GetTimeZoneInfo("Australia/Sydney");

        DateTime formattedTime = TimeZoneInfo.ConvertTimeFromUtc(date.Date, timezoneInfo);

        Console.WriteLine(formattedTime.ToString(format));

    }

}