voting rights By kibler Jan 1, 1865 13 amendment Period: Jan 1, 1865 to Dec 31, 1965 voting rights Dec 2, 1869 15 amendment Dec 2, 1896 voting rights for blacks in southern states Dec 2, 1898 litercy rights are constitutional Dec 2, 1915 grandfather clause unconstitutional Dec 2, 1920 19 amendment Dec 2, 1937 poll taxes are constitutional Feb 2, 1964 24 amendment outlaw poll taxes Jun 2, 1964 freedom summer is an attempt to register blacks to vote mississippi Jun 1, 1965 voting right acts bans racial and ethnic discrimination in elections