1991: The Year Punk Broke is a 1992 documentary directed by Dave Markey featuring American alternative rock band Sonic Youth on tour in Europe in 1991. While Sonic Youth is the focus of the documentary, the film also gives attention to Nirvana, Dinosaur Jr., Babes in Toyland, Gumball and The Ramones. Also featured in the film are Mark Arm, Dan Peters and Matt Lukin of Mudhoney, Courtney Love, and Joe Cole, who was murdered in a robbery three months after the tour ended. The film is dedicated to him. —Wikipedia
One 20th anniversary will be sucking all the air out of this weekend, but there are a couple of others that may not be so peripheral.