aug 15, 1984 - The Motion Picture Association of America institutes the PG-13 rating, as a response to violent horror movies such as Gremlins and Indiana Jones and the Temple of Doom.
Description:
http://www.nytimes.com/1984/08/13/arts/some-groups-unhappy-with-pg-13-film-rating.htmlhttp://www.nytimes.com/1984/06/23/movies/debate-over-film-ratings-widening.html
http://www.nytimes.com/1984/06/20/movies/hollywood-plans-new-rating-to-protect-children-under-13.html
http://www.nytimes.com/1984/05/21/movies/indiana-jones-stirs-ratings-debate.html
Added to timeline:
Date:
aug 15, 1984
Now
~ 40 years ago