On September 25, 1926, 100 years ago today, Henry Ford put his factory workers on a five-day, 40-hour week with no cut in pay, one of the first major American employers to do so. Ford argued that workers with a full weekend off would have more time to buy and use things like cars, and the change helped push the rest of American industry toward the modern workweek and weekend, a standard Congress wrote into law with the Fair Labor Standards Act in 1938. This photograph shows the crowd pouring onto the street at the four o’clock shift change outside the Highland Park Ford Plant, where Ford had introduced the moving assembly line in 1913 and the five-dollar, eight-hour day the following year. It was made on a glass-plate negative by the Detroit Publishing Company sometime between 1910 and 1920. From the Library of Congress Prints and Photographs Division, public domain.