Sapattivuosi is a Finnish Black Sabbath tribute band singing in Finnish. The band was initiated as a project by vocalist Hannu Paloniemi, drummer Simo Vehmas and guitarist Janne Halmkrona. Sapattivuosi's first two albums covered songs from the Ozzy Osbourne era. Then vocalist Paloniemi left the band. He was replaced by Marco Hietala, known from bands such as Nightwish, Tarot and Northern Kings. Hietala first appeared with Sapattivuosi on their single Pelon lait, which came out on March 4, 2009.