Facebook reminds people of birthdays, so I always get a flood of Facebook posts on my birthday. I don't think it's usually because they remembered it themselves, and the messages usually aren't very personal. I guess I'm very weird, because I don't enjoy receiving a bunch of generic messages that say nothing more substantive than "Happy birthday".

But rather than complain about it, I tried to channel my annoyance into something positive last time by setting up a birthday fundraiser so that, whenever someone posted a generic "Happy birthday!" message, I would thank them and reply with a link reminding them of my birthday fundraiser. So when I received annoying repetitive birthday greetings, I got to annoy them back with a repetitive message of my own. What are they going to do? Tell me I'm a jerk for raising money for a good cause on my birthday? Obviously my motivation was very passive-aggressive and childish, but I ended up raising a few hundred dollars for a legal fund to help people in ICE centers, so I'll probably do the same thing next year.

Having said all that, as much as I might like to say that my birthday isn't important to me, I think I'd be mildly bummed if nobody sent me a greeting. And judging by this thread, it looks like some people find it really important to receive birthday greetings and are very hurt when they don't receive one. So I'm trying to send my friends birthday greetings more often, although I try to personalize them at least a little bit.