Facebook birthdays incorrect on Samsung Galaxy SIII

I have done have done this and it worked, but most of the birthdays on on the wrong dates. Why? I checked the dates on Facebook, and they are correct, but wrong on my calendar. Anyone else?

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is the date format on your phone different from how things are set in the facebook app? For example, is Jan 15 1/15 or 15/1 ?

I've also had this problem ... i resynced the app and then it was all fine ..

My Facebook sync made it so that all of the birthdays are on their twice. Once on the real date and once on a date 2 or 3 days off of that. It also made all of my Facebook friends birthdays go on my calendar when I selected that it sync only contacts already in my phonebook. The Facebook app is so buggy.