using System.Globalization;
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));