Kipper's Birthday

Kipper first appeared on four legs in the Mick Inkpen timeless picture book "The Blue Balloon". The picture book, "Kipper", first published in 1991 made him the star of the show and he's been going from strength to strength ever since. Kipper's world is a world where anything can happen and he has enormous child appeal. He is a classic picture character now, loved by children the world over in the same way that Thomas the Tank or Peter Rabbit are loved. When exactly is Kipper's birthday party? Is it today? Or tomorrow perhaps? Or was it yesterday?