"5.15" (sometimes written "5:15" or "5'15") is a song written by Pete Townshend of British rock band The Who from their second rock opera, Quadrophenia (1973). The song reached #20 on the UK Singles Chart, while the 1979 re-release (accompanying the film and soundtrack album) reached #45 on the Billboard Hot 100.

Although written as "5.15" on the single cover, on the back cover of Quadrophenia (the album from which the song is taken) it is written as "5:15".

In the song, the main character Jimmy has taken the titular train to Brighton, consumed a lot of drugs, recollecting his life with the Mods, the cultural movement to which he belongs (even if he has dropped out for now), and their duels with the Rockers. Jimmy's memories are extremely disjointed, consisting mainly of anger, confusion, violence, sexual frustration, and rootlessness.

"5.15", like many of the songs from Quadrophenia, is self-referential - "M-m-m-my generation" is a line - and thus represents an angrily self-centered, teenage disconnection with society, family and the opposite sex. 'Jimmy' was "born in the war" (that is, World War II and its aftermath) and does not understand why he should care about it (or anything) in the context of his extravagant Mod values.

Year 15 (XV) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Caesar and Flaccus (or, less frequently, year 768 Ab urbe condita). The denomination 15 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Chris Omprakash Sharma (born April 23, 1981 in Santa Cruz, California) is an American rock climber.

Chris Omprakash Sharma was raised in Santa Cruz, California, son of Gita Jahn and Bob Sharma. He started rock climbing when he was 12 at the Pacific Edge climbing gym. Sharma went to Mount Madonna school and attended Soquel High School for one year.

At age 14, Sharma won the Bouldering Nationals. A year later, he completed a 5.14c climb, which was the highest-rated climb in North America at the time.

Sharma then moved to Bishop, California, where he climbed The Mandala, a bouldering problem rated V12.

In July 2001, Sharma completed the extension of the established route Biographie in Ceüse, located in the Hautes-Alpes Department of France and renamed it Realization, ignoring the European tradition that equippers and not climbers name routes outside the US. At the time of the first ascent, Biographie was widely considered to be the first consensus 5.15a (9a+) in the world. He has since established or completed many routes at or above 5.15, including La Rambla and Es Pontas (a deep water soloing project in Mallorca). In 2008 Sharma climbed the 250-foot line (76 m), Jumbo Love, at Clark Mountain in California, claiming 5.15b for the grade.

John Alec Entwistle (9 October 1944 – 27 June 2002) was an English bass guitarist, songwriter, singer, horn player, and film and record producer who was best known as the bass player for the rock band The Who. His aggressive lead sound influenced many rock bass players. He was inducted into the Rock and Roll Hall of Fame as a member of the Who in 1990.

Entwistle's lead instrument approach used pentatonic lead lines, and a then-unusual trebly sound ("full treble, full volume") created by roundwound RotoSound steel bass strings. He had a collection of over 200 instruments by the time of his death, reflecting the different brands he used over his career: Fender, Danelectro, and Rickenbacker basses in the 1960s, Gibson and Alembic basses in the 1970s, Warwick in the 1980s, and Status all-Carbon fibre basses in the 1990s. In 2011, a Rolling Stone reader poll selected him as the No. 1 rock bassist of all time.

John Alec Entwistle was born in 1944 into a musical family in Chiswick, a London suburb. His father Herbert played trumpet and his mother, Queenie Maud Johns Entwistle (29 November 1922 – 4 March 2011), played piano. His parents' marriage failed soon after he was born, and Entwistle was mostly raised by his grandparents. He attended Acton County Grammar School and joined the Middlesex Youth Orchestra. His initial music training was on trumpet, french horn and piano, all three of which would feature in his later rock compositions.

David Bowie ( /ˈboʊ.i/ BOH-ee; born David Robert Jones on 8 January 1947) is an English musician, actor, record producer and arranger. A major figure for over four decades in the world of popular music, Bowie is widely regarded as an innovator, particularly for his work in the 1970s. He is known for his distinctive voice and the intellectual depth and eclecticism of his work.

Bowie first caught the eye and ear of the public in July 1969, when his song "Space Oddity" reached the top five of the UK Singles Chart. After a three-year period of experimentation he re-emerged in 1972 during the glam rock era with the flamboyant, androgynous alter ego Ziggy Stardust, spearheaded by the hit single "Starman" and the album The Rise and Fall of Ziggy Stardust and the Spiders from Mars. Bowie's impact at that time, as described by biographer David Buckley, "challenged the core belief of the rock music of its day" and "created perhaps the biggest cult in popular culture." The relatively short-lived Ziggy persona proved merely one facet of a career marked by continual reinvention, musical innovation and striking visual presentation.