14th » The Mariner 4 flyby of Mars takes the first close-up photos of another planet.
16th » The Mont Blanc Tunnel linking France and Italy opens.
25th » Bob Dylan goes Electric Dylan controversy named electric as he plugs in at the Newport Folk Festival, signaling a major change in folk and rock music.
26th » Full independence is granted to the Maldives.
28th » Vietnam War: U.S. President Lyndon B. Johnson announces his order to increase the number of United States troops in South Vietnam from 75,000 to 125,000.
29th » Vietnam War: The first 4,000 101st Airborne Division paratroopers arrive in Vietnam, landing at Cam Ranh Bay.
30th » U.S. President Lyndon B. Johnson signs the Social Security Act of 1965 into law, establishing Medicare (United States) called Medicare and Medicaid.