Black Sabbath is the debut studio album by English heavy metal band Black Sabbath. Released on 13 February 1970 in the United Kingdom, and later on 1 June 1970 in the United States, the album reached number eight on the UK Albums Chart and has been recognised as the first major album to be credited with the development of the heavy metal genre.
In August 1969 the band, who were then known as Earth, decided to change their name to Black Sabbath. This was because there was another band also known as Earth, and also as homage to the 1963 classic Mario Bava terror film starring Boris Karloff. Around the same time they recorded and distributed a demo version of their eponymous song. In November 1969 they recorded their debut single, "Evil Woman", released in January 1970, and recorded and mixed the remaining seven songs that would appear on their debut album. According to guitarist Tony Iommi, "We just went in the studio and did it in a day, we played our live set and that was it. We actually thought a whole day was quite a long time, then off we went the next day to play for £20 in Switzerland."
Iommi recalls recording live: "We thought 'We have two days to do it and one of the days is