The Roaring Twenties, sometimes stylized as Roaring '20s, refers to the 1920s decade in music and fashion, as it happened in Western society and Western culture. It was a period of economic prosperity with a distinctive cultural edge in the United States and Europe, particularly in major cities such as Berlin, Buenos Aires, Chicago, London, Los Angeles, Mexico City, New York City, Paris, and Sydney. In France, the decade was known as the années folles, emphasizing the era's social, artistic and cultural dynamism. Jazz blossomed, the flapper redefined the modern look for British and American women, and Art Deco peaked.

The Années folles was the decade of the 1920s in France. It was coined to describe the social, artistic, and cultural collaborations of the period. The same period is also referred to as the Roaring Twenties or the Jazz Age in the United States. In Germany, it is sometimes referred to as the Golden Twenties because of the economic boom that followed World War I.