What word or phrase does your mother always say?
pertaining to the end of the 19th century, esp. its fashions, art, literature
French 'end of the century'
1890, from French fin de siècle "end of century," phrase used as an adjective. At the time it meant "modern;" now it means "from the 1890s." "App. first in title of a comedy, Paris fin de siècle, produced at the Gymnase, Feb. 1890" [Weekley]. French siècle "century, age" is from Latin saeculum (see secular).
The end of the nineteenth century; the phrase is French for “end of the century.” Fin de siècle is particularly used to describe the period's self-conscious artistic movements and a sophisticated despair that became popular at the time. Oscar Wilde is one of the best-known fin-de-siècle figures.