Biography
There are at least two Bands called 7Days.
One is a Punkband from Germany, who was formed to produce only one album, which you can download for free at their Homepage.
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The other band is a swedish Symphonic prog metal Band with influences of Dark Rock and Doom Metal.
All the bandmembers have their own bands and are experienced and influenced by several musical styles.
Biography text from Last.fm, available under CC BY-SA.