The Days of Grays is the sixth full-length studio album by Finnish power metal band Sonata Arctica. The album was released in South America on 8 September 2009, on 16 September in Finland, 18 September in Europe and 22 September in North America through Nuclear Blast. The special edition of the album includes the album along with an orchestral CD as a digipak. 　　It is the first album with guitarist Elias Viljanen and also the first since 1999's Ecliptica in which vocalist Tony Kakko also plays the keyboards. 　　All music by Tony Kakko except "Nothing More" by Henrik Klingenberg, all lyrics by Tony Kakko, songs arranged by Sonata Arctica. 　　"Flag in the Ground" is a re-working of an old pre-Sonata Arctica song called "BlackOut" from the band's "Friends Till the End" demo they recorded under the name Tricky Beans. 　　Tony Kakko – vocals, additional keyboards 　　Elias Viljanen – guitar 　　Marko Paasikoski – bass guitar 　　Henrik Klingenberg – keyboards, Hammond 　　Tommy Portimo – drums 　　Johanna Kurkela – female vocals (on 2, 9) 　　Perttu Kivilaakso (Apocalyptica) – Cello (on 1, 6, 11, 12 and "In My Eyes You're a Giant")