It’s October 30th and here are some reasons why this day matters in rock history:- In 1971, John Lennon’s Imagine was the No. 1 album in the US. - In 1998, all four members of Black Sabbath reunited to play “Paranoid” on The Late Show with David Letterman. - In 1988, Nirvana singer Kurt Cobain smashed his very first guitar. - In 1999, in an early attempt to show video on the Internet, Neil Young “cybercast” his annual Bridge School Benefit.