"Rock Around the Clock" was a Last-Minute Addition to
the recording session. 

On April 12, 1954, Bill Haley and His Comets recorded
“(We’re Gonna) Rock Around The Clock” at a Decca
recording session in New York City.

If rock and roll was a social and cultural revolution,
then “(We’re Gonna) Rock Around The Clock” was
its Declaration of Independence. And if Bill Haley
was not exactly the revolution’s Thomas Jefferson,
it may be fair to call him its John Hancock.

The song was chosen to play over the opening
credits of the film Blackboard Jungle, which is
how it became a pop sensation, selling a million
copies in a single month in the spring of 1955.

William (Bill) John Clifton Haley
(July 6, 1925 – February 9, 1981)