My birthday is coming up next month and my lovely wife and KH has been asking me what I want for my birthday. We have a scheduled lock period which is every Wed to Fri no unlocks 24/7 which we have been doing for 2-3 months now. All i can think about is asking her to lock me for a month as a countdown to my birthday. Not sure what else you guys have asked your wife or KH for your birthdays which you'd like to share.
Do you have a kink that you have not told her about? This may be the time. Or you could ask for extra tease time.
I would never ask or expect something sexual or chastity related for my birthday.... it is just part of our relationship now, and if she feels inclined to add something in on those days so be it. If anything I would probably be happy going out to eat and having a good time. I love pizza and junk food like that.
I'm with King Hippo on this one. I wouldn't ask for anything kinky unless that's part of your relationship. I guess if I were in your case, I'd just want to serve her and make the day about being happy by making her happy. But that's just me.