Never forget a birthday again!
drupe will automatically remind you of your contacts' birthdays. To select the birthday for a contact, tap the desired contact. While in the contact's profile entry, tap to edit it. Add their birth date and save.
To set the time for the reminder, go to drupe Settings > Contacts > Birthday reminders > Reminder time. To disable this feature, uncheck Enabled there as well.
If you'd like, there are several apps that can sync your Facebook friends' birthdays with their phonebook entries. Look it up 😉