The Seventies By Brendaa H. Period: Jan 1, 1970 to Jan 1, 1979 The Seventies Apr 22, 1970 The First Earth day Jun 27, 1970 26th Amendment , 18 year olds given the right to vote Dec 31, 1970 The Beatles . Break Up hello Oct 1, 1971 Disney World Opens Nov 24, 1971 China join the UN