From the context of art background, modernity (modernité) has a far more restricted sense, modern art masking the duration of c. 1860–1970. Use in the term On this sense is attributed to Charles Baudelaire, who in his 1863 essay "The Painter of Modern Life", specified the "fleeting, ephemeral practical experience https://heliskidirectory.com/listings12684993/culture-of-the-united-states-an-overview