I was always great with birthdays of friends, knowing when they were and prior to email, sending them a card and calling. There was often a surprise from the recipients because who, after all, recalls birthdays of those to whom they are especially close.
These days, however, given Facebook and others, no one has to worry about when there's a birthday, it's apparently automatic that it shows up on these sites, with scores of attendant greetings.
I wonder, then, if there's any true meaning to sending one. To me, a great part of offering congratulations for this day is remembering or being thoughtful enough to having it written down personally.
My sons' birthdays are this week…I do not need to write those down.