Birthday reminders are awesome except when they are not
Birthday reminders are really awesome and super useful. They are fantastic, as long as they are for people whom I wish to be notified. Thus may I suggest that the Birthday Calendar feature is off by default, and each contact whom I wish to be notified of their birthday, may be done selectively. In other words I would like birthday reminders to be off by default, and on only for specific contacts that I've chosen.