master
8345799: Update copyright year to 2024 for core-libs in files where it was missed
8319423: Improve Year.isLeap by checking divisibility by 16
6453901: (cal) clean up sun.util.calendar classes
8316435: sun.util.calendar.CalendarSystem subclassing should be restricted
8345325: SM cleanup of GetPropertyAction in java.base
8347955: TimeZone methods to stream the available timezone IDs