March 31 - Professor Albert Einstein arrives in New York to give a lecture on his new theory of relativity.
June 10 - Congress passes the Budget and Accounting Act.
June 20 - Alice Robertson of Oklahoma becomes the first woman to preside over the House of Representatives.
June 25 - Samuel Gompers is elected President of the American Federation of Labor for the 40th time.
August 3 - The first aerial crop dusting operation takes place at Troy, Ohio.
August 25 - The U.S. signs a peace treaty with Germany and Austria.
September 7 - The first Miss America Pageant is held at Keith's Theater on the Garden Pier in Atlantic City, New Jersey.
November 2 - Margaret Sangers National Birth Control League combines with Mary Ware Denetts Voluntary Parenthood League to form the American Birth Control League.
November 13 - The Pacific Treaty is signed between the U.S., Great Britain, France and Japan.
November 29 - The U.S., Great Britain, France and Japan sign the Washington Treaty to limit naval armaments.
