No founder, launch announcement or registration for National Joey Day has been found. The earliest dated trace of it is a holiday listing captured by the Internet Archive on 12 August 2022, already giving the date as July 14, which fixes a point by which the day was circulating rather than a point at which it began.
The clown who gave his name away
Joseph Grimaldi first appeared as a clown at Sadler's Wells in Islington in 1800, in a piece called Peter Wilkins, or, Harlequin in the Flying World. Over a thirty year career the part became so completely his that audiences began calling it by his own short name instead.
It stuck long after him. By 1926 a glossary of American circus talk needed only a line for it, and printed the whole definition as three words.


