Hello

I suggest that you develop a stronger calendar to support more types of calendars and define additional fields based on that. Currently, additional fields only support the Gregorian calendar. Microsoft supports multiple calendars such as the following:

System.Globalization.GregorianCalendar

System.Globalization.EastAsianLunisolarCalendar

System.Globalization.JapaneseCalendar

System.Globalization.JulianCalendar

System.Globalization.PersianCalendar

System.Globalization.HijriCalendar

System.Globalization.HebrewCalendar

System.Globalization.KoreanCalendar

System.Globalization.TaiwanCalendar

System.Globalization.ThaiBuddhistCalendar

System.Globalization.UmAlQuraCalendar

I also suggest integrating with other third-party calendars such as Microsoft, Google and Apple in scheduler section following:

Thanks