The Beatles - A Day in The Life: June 8, 1966
Studio Two, EMI Studios, London
One of the quickest recordings on Revolver was Paul's "Good Day Sunshine" in that the released version was take one -although it had numerous overdubs and could in no way be compared with the truly-live one-take recordings of 1963 and 1964. Actually, the group recorded three takes of the rhythm track during this 2:30 pm to 2:30 am session but returned to the first to overdub Paul's lead and John and George's backing vocal. More overdubs would also be taped on June 9th. Work this day had begun when Geoff Emerick edited together wo of Monday's mono mixes of "And Your Bird Can Sing", done from 1:00 to 2:00 pm.
Source: The Complete Beatles Chronicle - Mark Lewisohn