Circa (stylized as CIRCA:) is a progressive rock supergroup[1] founded by four musicians associated with Yes: former Yes members Alan White (drums), and Tony Kaye (Hammond, keyboards), current Yes members Billy Sherwood (vocals, bass guitar) and Jay Schellen (drums), and guitarist Jimmy Haun, who played on the Yes album Union.
A few years after Lodgic split up, Billy Sherwood was introduced to Yes bassist Chris Squire and other members of Yes, including Kaye and White.
Meanwhile, both Haun and Michael Sherwood came to do session work on the second album from the Yes spinoff band, Anderson Bruford Wakeman Howe.
In the mid-2000s, he organised two Pink Floyd tribute albums, Back Against The Wall and Return To The Dark Side Of The Moon, and some further projects which featured an array of former and current Yes members as guests, including Kaye, White, Geoff Downes, Peter Banks, Bill Bruford, Steve Howe, and Rick Wakeman.
On 30 July 2007, the band self-released their nine-song debut album, Circa 2007, with guest appearances by Michael Sherwood and Cole Coleman.
The band's debut live show was on August 23, 2007 in San Juan Capistrano, with a set including an extended instrumental medley of Yes tunes.
Jay Schellen also departed, wanting to focus on work with Asia Featuring John Payne and Unruly Child.
[9] On April 15, 2019, Sherwood announced on his Facebook page that he and Tony Kaye are currently "chipping away at various musical ideas" for a fifth album.