Happy Birthday Eeyore!

  Eeyore is my favorite character of the Winnie the Pooh books/movies/tv shows/media empire.  Go here to read about his awesomeness:  http://www.guardian.co.uk/books/booksblog/2011/may/09/eeyore-literature-archetypal-outsider

Some people say that his birthday is in April.  Some seem to think it’s Christmas.  Some say he’s 140 years old.  Some say he’s 90.  I’m curious, are there actual Winnie the Pooh historian types?  And if they do exist (which I’m sure they must) then how old is my favorite sarcastic, slightly depressive, tail-losing donkey of delightfulness?