In the spring of 2018, Ketil Bjørnstad realized that it was only a scarce year before 50 years had passed since he debuted as a pianist with the Philharmonic in the University’s Aula on January 10, 1969. On that day this year, the celebration of what is Bjørnstad’s year began. 2019 started with a nice new release of Rainbow Sessions. The World I Used To Know is released at Grappa Musikkforlag, recorded in the world’s most famous studio – Abbey Road in London, more specifically in Studio Two where, among others, The Beatles recorded their material. The album is released not only on CD, vinyl and digital, but also as a magnificent box consisting of five CDs. The box contains the recordings from Abbey Road, but also three CDs of music from his entire career with various guest vocalists, and not least one new record recorded in Rainbow Studio in Oslo.