"Rock Around the Clock" is a rock and roll song in the 12-bar blues format written by Max C. Freedman and James E. Myers (the latter being under the pseudonym "Jimmy De Knight") in 1952. The best-known and most successful rendition was recorded by Bill Haley & His Comets in 1954 for American Decca. It was a number one single for two months and did well on the United Kingdom charts; the recording also reentered the UK Singles Chart in the 1960s and 1970s.

It was the first rock and roll record to reach #1 on the US charts. (Bill Haley had American chart success with "Crazy Man, Crazy" in 1953, and in 1954, "Shake, Rattle and Roll" sung by Big Joe Turner reached No. 1 on the Billboard R&B chart). Haley's recording became an anthem for rebellious 1950s youth, particularly after it was included in the 1955 film Blackboard Jungle. It was Number 1 on the pop charts for two months and went to Number 3 on the R&B chart.The recording is widely considered to be the song that, more than any other, brought rock and roll into mainstream culture around the world. The song is ranked No. 159 on the Rolling Stone magazine's list of The 500 Greatest Songs of All Time.

Although it was first recorded by Italian-American band Sonny Dae and His Knights on March 20, 1954, Myers claimed the song had been written specifically for Haley but, for various reasons, Haley was unable to record it himself until April 12, 1954.

The original full title of the song was "We're Gonna Rock Around the Clock Tonight!". This was later shortened to "(We're Gonna) Rock Around the Clock", though this form is generally only used on releases of the 1954 Bill Haley Decca Records recording; most other recordings of this song by Haley and others (including Sonny Dae) shorten this title further to "Rock Around the Clock".

In 2018, it was selected for preservation in the National Recording Registry by the Library of Congress as being "culturally, historically, or artistically significant."

Bill Haley & His Comets were an American rock and roll band, founded in 1952 and continued until Haley's death in 1981. The band was also known as Bill Haley and the Comets and Bill Haley's Comets (and variations thereof). From late 1954 to late 1956, the group placed nine singles in the Top 20, one of those a number one and three more in the Top Ten. The single "Rock Around the Clock" became the biggest selling rock and roll single in the history of the genre and retained that position for some years.Bandleader Bill Haley had previously been a country music performer; after recording a country and western-styled version of Jackie Brenston and his Delta Cats "Rocket 88", a rhythm and blues song, he changed musical direction to a new sound which came to be called rock and roll.

Though the group was considered to be at the forefront of rock and roll during the genre's formative years, the arrival of more risqué acts such as Elvis Presley and Little Richard by 1956 led the more clean-cut Haley and his Comets to decline in popularity. Haley would remain popular in Europe and go on to have a comeback as a nostalgia act in the 1970s, along with many of his contemporaries. Following Haley's death, no fewer than seven different groups have existed under the Comets name, all claiming (with varying degrees of authority) to be the continuation of Haley's group. As of the end of 2014, four such groups were still performing in the United States and internationally.