1921 - 1941 By hectord2022 Mar 4, 1921 Inauguration of Warren Harding Aug 2, 1923 Inauguration of Calvin Coolidge Mar 4, 1929 Inauguration of Herbert Hoover Oct 29, 1929 Stock Market Crash May 21, 1932 First Solo Nonstop Transatlantic Flight Performed by Amelia Earhart Jan 20, 1937 Second Inauguration of Franklin Roosevelt Jun 25, 1938 Ratification of the Fair Labor Standards Act Period: Sep 1, 1939 to Sep 2, 1945 World War II