Etymology Borrowed from French fin-de-siècle (literally “end of the century”).
1
Pertaining to the close of the 19th century, usually suggesting a literary and artistic climate of modernism, world-weariness, and self-indulgence.
The fin-de-siècle phenomenon has, of course, received considerable attention from historians in the recent past—a testament to its appeal. […] They also tend to concentrate on individual as well as social alienation as particularly characteristic of the fin-de-siècle feeling.1990, Mikulas Teich, Roy Porter, Fin de Siècle and Its Legacy, Cambridge University Press, →ISBN, page 3:
2
Broadly Pertaining to the close of the 20th (or any other) century.
And, Dag, have you ever noticed that your bungalow looks more like it belongs to a pair of Eisenhower era Allentown, Pennsylvania newlyweds than it does to a fin de siècle existentialist poseur?1991, Douglas Coupland, “Eat Your Parents”, in Generation X, New York: St. Martin's Press, →OCLC, page 85:
fin de siècle
noun
Etymology Borrowed from French fin-de-siècle (literally “end of the century”).
1
The closing era of any century; (loosely) the end of any era.
From these conversations, most of which took place on the condition of anonymity to speak freely, a picture emerged in which America's closest allies are looking on with a kind of stunned incomprehension, unsure of what will happen, what it means, and what they should do, largely bound together with angst and a shared sense, as one influential adviser told me, that America and the West are approaching something of a fin de siècle.2020 June 24, Tom McTague, “The Decline of the American World”, in The Atlantic: