1776 Edit History Talk0 1,622pages on this wiki 1776 was a year in the 18th century. Events July 4 (and subsequently August 2): The Declaration of Independence is signed. Read more 1958 was a year in the 20th century. Wednesday, March 26 -- Biff Tannen turns 21 and uses the... 1958 1947 was a year in the 20th century. The transistor is invented. Emmett Brown stated that... 1947 2007 was a year in the 21st century. Tuesday, January 9: Futurepedia was founded. Friday, March... 2007 Categories: Years