AddressBook Changes AddressBook ABPerson.h Added kABPersonAlternateBirthdayCalendarIdentifierKey Added kABPersonAlternateBirthdayDayKey Added kABPersonAlternateBirthdayEraKey Added kABPersonAlternateBirthdayIsLeapMonthKey Added kABPersonAlternateBirthdayMonthKey Added kABPersonAlternateBirthdayProperty Added kABPersonAlternateBirthdayYearKey