Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The calendarId accessor property of Temporal.ZonedDateTime instances returns a string representing the calendar used to interpret the internal ISO 8601 date.
For a list of commonly supported values, see Intl.Locale.prototype.getCalendars().
The set accessor of calendarId is undefined. You cannot change this property directly. Use the withCalendar() method to create a new Temporal.ZonedDateTime object with the desired new value.