If you use Address Book’s near-hidden feature of including a birth date in someone’s record (in Address Book’s menu bar, select Card > Add Field > Birthday), you can now get those birthdays to automatically show up in iCal. All you need to do is:
- Open iCal (located in your Dock or in your Applications folder)
- Open iCal’s preferences (iCal > Preferences, or Command-,)
- Turn on “Show Birthdays calendar”
A new calendar called Birthdays appears in iCal’s list of calendars to the left. (Notice the little birthday cake icon to the right of the calendar name.)

No Reminders?
As far as I could see, there wasn't any possibility to set an alarm for these birtdays. Well, birtdays are the things I have to be reminded most :-)
I am enlighted!
I didn't recognize it as a birtday cake, looks more like some kind of radio transmitter to me. :-P
Am I missing something?
Ok, I'm loving Tiger, in general, but this is just weird:
I've followed the very simple instructions laid out by everybody and their mother on the internet on how to create this birthday calendar thing. The problem is, it just doesn't work. I have tons of birthdays in my address book (close to 70%, I'd guess), and they just don't get recognized. They're all year-specific dates: 3/1/1983, for example. Could this be the problem? I should note, even when I try to create a smart group in address book based on birthdays, there's no listing there, either. Am I doing something really simple wrong?