Rosa Parks famously refused to give up her bus seat on December 1, 1955, sparking the Montgomery Bus Boycott. She sat down in the colored section of Cleveland Ave. Bus and refused to give up her seat to a white man who was standing after driver James F. Blake (who had left her in the rain previously) demanded she move. The authorities were called and Parks was arrested on the spot. The Boycott lasted from December 1, 1955 to December 20, 1956, when a federal ruling, Browder v. Gayle, led to a United States Supreme Court decision that declared the Alabama and Montgomery laws requiring segregated buses unconstitutional.