1st » A joint American–French expedition locates the wreckage of the RMS called Titanic.
4th » The discovery of Buckminsterfullerene, the first fullerene molecule of carbon.
6th » Midwest Express Airlines Flight 105, a Douglas DC-9 crashes just after takeoff from Milwaukee, Wisconsin, killing 31.
13th » 'Super Mario Bros.' is released in Japan for the Nintendo Entertainment System called NES, which starts the 'Super Mario (series) called Super Mario' series of platforming games.
14th » Penang Bridge, the longest bridge in Malaysia, connecting the island of Penang to the mainland, opens to traffic.
19th » 1985 Mexico City earthquake or A strong earthquake kills thousands and destroys about 400 buildings in Mexico City.
19th » Tipper Gore and other political wives form the Parents Music Resource Center as Frank Zappa and other musicians testify at United States Congress or U.S. Congressional hearings on obscenity in rock music.
20th » Capital gains tax is introduced in Australia, one of a number of tax reforms by the Hawke/Keating government.