Siri reports my correct birthday, but then uses wrong date when asked how many days until my birthday When I say to Siri "When is my Birthday", the response is May 20th, which is correct.

However, when I say "How many days until my birthday" the response uses September 16th as the birthday. How do I fix this?
This is most likely a bug that either Apple or Wolfram Alpha will have to fix. I reported the bug at http://bugreport.apple.com/ .