"Sunshine Day" is a song recorded by British progressive rock group Jethro Tull. It was released as the A-side of the group's debut single, and was recorded on 6–7 January 1968 at CBS Studios in London. The single released on 16 February 1968 by MGM Records, in the UK only. The B-side, "Aeroplane", was recorded on 22 October 1967 at EMI Studios, London, under the artist name "John Evan Band". Both tracks were produced by Derek Lawrence, who is also credited with purposely designating the band as 'Jethro Toe'. Apparently, he did not like the name 'Jethro Tull'.