In 1913, the first-known calendar nude appeared, called "September Morn", a reproduction of an oil painting,"Matinee Septembre", by a French artist, Paul Chabas (1869-1937).

The painting might have gone unnoticed if Comstock, of the Society for the Suppression of Vice, had not demanded the removal of the painting from the window of a New York art gallery. A salesman explained that the painting had recently won a Medal of Honour from the French Academy, but we may presume, Comstock was not impressed.