I'm doing some summarising of dated data from Coredata using @SectionedFetchRequest and SwiftUI List with Section headers. Summary options are by week, month, quarter and year, with processing by Calendar Component. All works fine (with a bit of extra processing for the week period description) except for quarter, which always returns zero instead of 1 to 4. When I finally decided to look at the documentation https://developer.apple.com/documentation/foundation/calendar/component/quarter there's an Important note saying "The quarter unit is largely unimplemented, and is not recommended for use.". So why have that enumeration if it's known not to work?
OK, so I now get the month and then determine the quarter with a switch statement.......
