Connect with my address book, find todays birthdays and send them a predefined (in settings) message on their birthday. Remind me at least once a year (let me choose the intervall) to change that message. Even better, create a folder (like Snooze) where the upcoming birthday messages are queued for delivery and where I could still add some "personal" message before they will be sent. Maybe fill that folder once a month or once a week (again, let me choose). That would save me really a lot of time every day.