["I'm not a fan of birthdays, so I usually try to keep my birthday secret from people when I meet them."]
I'm kinda the same way. Although, I feel like if my friends truly care about me, they'll find out and remember my birthday on their own. No need to go blabbing to everyone about it.
I make it a habit of not telling people when my birthday is.  This year however, a friend from work got me something,even though i thought he didn't know when my birthday was.