Why can I add alarms to my Birthday calendar from Apples Addressbook?
The “fake” calendar from apples addressbook is not an iCal file. It is a listing of dates in your addressbook. And as such it is not editable. Apple only allows editing on your personal calendars, not the ones you share from others or “locked” calendars from the internet. So in Alarmist you will see all the calendars that you can modify. Thats why you CAN’T set an alarm in that fake birthday calendar. But since Alarmist 1.2 you can synchronize the addressbook dates with a REAL calendar you might call “My birthdays”.