The 1920s was the decade from January 1, 1920, to December 31, 1929, a period of dramatic change in American life. The decade earned the nickname the Roaring Twenties because of its explosive energy, rapid cultural shifts, and booming economy.

After World War I ended in 1918, Americans felt optimistic and eager to enjoy life. Cities grew larger as people moved from farms to urban areas. New technologies transformed daily life: radios brought music and news into homes, electric appliances made housework easier, and affordable automobiles (especially the Ford Model T) gave families freedom to travel. Movies became wildly popular, and by the end of the decade, films had sound. Jazz music, created by Black musicians in cities like New Orleans and Chicago, spread across the country and gave the era one of its other nicknames: the Jazz Age.

American women gained the right to vote in 1920, and many began wearing shorter dresses, cutting their hair in bobs, and working outside the home. Young people challenged old social rules about behavior and entertainment. Baseball thrived, with stars like Babe Ruth becoming national heroes. Charles Lindbergh became famous worldwide after flying solo across the Atlantic Ocean in 1927.

However, the prosperity wasn't shared equally. Many farmers struggled financially, and racial discrimination remained severe, especially in the South. The decade ended with the stock market crash of October 1929, which triggered the Great Depression. Despite its dramatic end, the 1920s marked a turning point when America became a modern, urban, technology-driven nation.