All stoats celebrate their collective birthday.
My dad went to Australia. Don't worry, he came back again. Easier than shifting all those blocks, in the heat. None - since rocks are far too heavy to carry in that climate, and as the Ancient Egyptians had no knowledge of the Fork Lift Truck, the Great Pyramid was made entirely from polystyrene blocks, cunningly painted to resemble stone blocks. As we know that the Egyptians were skilled artists, this hypothesis seems to have a ring of truth about it.