How do we know that this is Dobby's birthday? Toon Ganondorf (t c) 13:32, 15 May 2009 (UTC)

J.K. Rowling's Official Site. In June 28, if you look at the Wizard of the Month section, a birthday cake appears next to Happy Birthday Dobby. This also happens with a number of other significant characters. -- Seth Cooper ^{(Owl Post)} 13:37, 15 May 2009 (UTC)