Function calendarNote

calendarNote(
    gregorianDate: string,
    calendar: CalendarName,
    country: string,
): CalendarNote | null
The note for a Gregorian date (as resolved, YYYY-MM-DD) written in calendar, or null; null too for a country the table does not date. A date that is not a valid Gregorian YYYY-MM-DD, a calendar other than "gregorian" and "julian", or a country that is not a nonempty string throws a RangeError.
Parameters
- gregorianDate: string
- calendar: CalendarName
- country: string
Returns CalendarNote | null