kCFCalendarComponentsWrap
kCFCalendarUnitDay
kCFCalendarUnitEra
kCFCalendarUnitHour
kCFCalendarUnitMinute
kCFCalendarUnitMonth
kCFCalendarUnitQuarter
kCFCalendarUnitSecond
kCFCalendarUnitWeek
kCFCalendarUnitWeekday
kCFCalendarUnitWeekdayOrdinal
kCFCalendarUnitWeekOfMonth
kCFCalendarUnitWeekOfYear
kCFCalendarUnitYear
kCFCalendarUnitYearForWeekOfYear