While in the context of artwork history, modernity (modernité) has a more confined feeling, modern art masking the period of c. 1860–1970. Use in the phrase In this particular feeling is attributed to Charles Baudelaire, who in his 1863 essay "The Painter of Modern Life", designated the "fleeting, ephemeral experience https://travialist.com/story6806407/culture-of-the-united-states-an-overview