In v1.0, it was possible to ask for permissions that would allow an app to see a limited amount of friend data, such as a person's friend's likes, their birthdays, and so on.
In v2.0, those permissions have all been removed. It's no longer possible for an app to see data from a person's friends unless those friends have also logged into the app and granted permission for the app to see it that data.
Now the issue is that how we can get the friends birthday.I am using user_friends permission that is providing me list of friends with their id, first name,middle name,gender but not birth day.