Home Events Grateful Dead Pull Off Instrument Switch On April Fools’ Day 1980 Grateful Dead Pull Off Instrument Switch On April Fools’ Day 1980 planetsixstring April 2, 2017 comments off Tweet on Twitter Share on Facebook Google+ Pinterest An inventive April Fools’ Day prank pulled by the Grateful Dead took place at the Capitol Theatre in Passaic, New Jersey on this date in 1980.