Ok so if you still use Facebook and you want to hide birthdays all of your responses are able to do this.
I have deleted all of the content in my Facebook account including I friending everyone and then sent the request to delete my account, I had my Facebook account since 2008 and over 300 friends. So my account has now completed the 14 days to completely delete what ever is left of my data on Facebook. Which was only my name. My problem is I still have the birthday data on my iPad I don't want to switch it off I want it deleted. This is the exact reason for getting off Facebook we have totally lost control of our ability to chose what we want to look at.
PLEASE HELP