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| 1966 | Osbourne, John Michael "Ozzy" |  |
| Birmingham Founder Member of Approach, foreunner of Black Sabbath |
| 1968 | Butler, Geezer | |
| Geezer Butler picks the name of the band after seeing it on a movie theatre marquee, thinking it sounded doomy & gloomy |
| 1968 | Osbourne, John Michael "Ozzy" | |
| Birmingham Founder Member of Black Sabbath |
| 1969 | Butler, Geezer | |
| Birmingham Founder Member of Black Sabbath |
| 1969 | Iommi, Tony | |
| Birmingham Founder Member of Black Sabbath |
| 1969 | Ward, Bill | |
| Birmingham Founder Member of Black Sabbath, drummer |
| 1970 | Osbourne, John Michael "Ozzy" | |
| Black Sabbath releases a first album, "Black Sabbath" |
| Black Sabbath release the Album, "Paranoid" |
| 1971 | Osbourne, John Michael "Ozzy" | |
| Black Sabbath release the Album, "Masters of Reality" |
| Black Sabbath release the Album, "Volume 4" |
| 1973 | Osbourne, John Michael "Ozzy" | |
| Black Sabbath release the Album, "Sabbath Bloody Sabbath" |
| 1976 | Osbourne, John Michael "Ozzy" | |
| Black Sabbath release the Album, "Technical Ecstasy" |
| 1977 | Osbourne, John Michael "Ozzy" | |
| Ozzy left Black Sabbath in October of 1977 to try and form the first incarnation of "Blizzard of Ozz" |
| 1977 | Walker, Dave | |
| Appointed lead singer of Black Sabbath taking over from Ozzy Osbourne for 2 months |
| 1978 | Osbourne, John Michael "Ozzy" | |
| Black Sabbath release the Album, "Never Say Die" |
| Rejoins Black Sabbath |
| 1982 | Osbourne, John Michael "Ozzy" | |
| Ozzy releases the live LP Speak Of The Devil with the favorites "Paranoid" and "Iron Man / Children Of The Grave" medley |
| 1985 | Osbourne, John Michael "Ozzy" | |
| Black Sabbath briefly reunites with Osbourne for a Live Aid concert |
| 1992 | Osbourne, John Michael "Ozzy" | |
| 15th Nov Iommi, Butler, and Appice back Ozzy Osbourne as part of what's billed as the singer's final live appearance |
| 1997 | Osbourne, John Michael "Ozzy" | |
| "The Ozzman Cometh" is released. A double-CD retrospective of Ozzy's work, it includes previously unreleased rehearsal tapes of four classic Sabbath songs |
| 1998 | Osbourne, John Michael "Ozzy" | |
| Oct Two-CD set "Reunion" is released, featuring all four of Black Sabbath's original members (Iommi, Osbourne, Butler, Ward) |
