No creator, founding year, or establishing record for National Peter Day has been located. A sweep of four competing holiday-listing sites found only one that carries the day at all, and no organisation is documented as running it.
The rabbit that was a real rabbit
On 4 September 1893 Beatrix Potter sat down to write to Noel Moore, the five-year-old son of her former governess. He was recovering from scarlet fever, so she told him a story about her own pet rabbit, Peter Piper.
At least six publishers turned the manuscript down, Frederick Warne among them, because they wanted something bigger and costlier. Potter's answer was that "little rabbits cannot afford to spend 6 shillings on one book and would never buy it". She paid for the printing herself, and 250 copies came off the press on 16 December 1901.


