Summer Days (And Summer Nights!!) is the ninth studio album by American rock band The Beach Boys, released on July 5, 1965 on Capitol. The release was their second in 1965. Summer Days (And Summer Nights!!) peaked at number 2 in the US during a chart stay of 33 weeks. It reached number 4 in the UK in the summer of 1966. The album is noted for the Wall of Sound production and arrangements featured on the majority of the album's backing tracks, now regarded as benchmarks for Brian Wilson's growth as a songwriter-producer-arranger. 　　In the early 1980s, as part of Capitol Records' repackage series of their Beach Boys albums, Summer Days (And Summer Nights!!) was retitled California Girls and deleted two tracks: "Amusement Parks, USA" and "I'm Bugged at My Ol' Man". The album was re-released in 1990s paired with The Beach Boys Today!; this package featured extensive liner notes and bonus tracks from that period. Until 2012, the album remained one of several early Beach Boys albums never mixed in true stereophonic sound.