Dates to iCal is a replacement for Apple's birthday calendar for iCal in Leopard. It has a range of features to allow the user to choose what, and what not, to sync to iCal from Address Book.

As well as automatically syncing birthday dates from Address Book, Dates to iCal 2 can sync anniversaries and custom dates. It provides the option of filtering to a group set up in Address Book, the user could use an already existing Address Book group, or could add one specifically for the purpose.