My address book won't let me add birthdays, why?

Greetings,

• Backup your computer Address Book: http://www.tuaw.com/2008/07/09/mac-101-back-up-address-book-ical-iphone-before-m obileme/
• Go to Apple Menu > System Preferences > Language & Text > Formats > Region. Region should be set to the country of your choice. Do not have it set to "Custom".

Try:

1. Quit all open Applications
2. Go to Apple > System Preferences > iCloud > Sign Out (if you are using it)
3. SafeBoot your computer: http://support.apple.com/kb/HT1455
4. While in SafeBoot remove the following to the trash:
   • Macintosh HD > Library > Caches (contents of this folder, not the folder itself)
   • Home > Library > Preferences > com.apple.AddressBook (remove any and all files with this in the title)
   • Home > Library > Preferences > ByHost > com.apple.AddressBook (remove any and all files with this in the title)
   • Home > Library > Caches > com.apple.AddressBook (remove any and all files with this in the title)

     NOTE: To get to "Home > Library" in Lion: Click anywhere on the desktop and then click on the "Go" menu at the top of the computer screen while holding down the "option" key on the keyboard. You will see "Library" in the menu.

5. Restart the computer normally to take yourself out of SafeBoot
6. Open the Address Book -- See if you can use the Birthday field now.

Assuming the field works and you use iCloud Go to Apple > System Preferences > iCloud > Sign In

If the same issue occurs reply back.

Hope that helps!

Enter the date as "April 15, 1993" (without the quotes).

Meaning, don't add the "th" part after the date.

It didn't even occur to me that one would type a date in with words so I just glossed over that part of the OP. 😐

Good reading Don!