The Beatles 5th album was released in the UK on this day in 1965. The US release followed a week later. The American album included instrumental music from the Help! movie, bumping two of the songs on the UK. Those appeared on Rubber Soul and Yesterday and Today.
The plan to have the band members spell out the title in semaphore on the UK cover was scrapped when the photographer realized that the semaphore arm positions for the corresponding letters looked a lot less like the letters than he expected they would. He then had the band improvise. The arm positions they choose come closest to the letters