8 January – British Rail authorities restrict Pipe Major Gordon Speirs to playing his bagpipes just one minute in every fifteen on Liverpool Street station, London, on grounds that his playing (part of a holiday campaign by the Scottish Tourist Board) “interferes with station business”.
9 January – Mick Jagger’s request for a Japanese visa is rejected on account of a 1969 drug conviction, putting an abrupt end to The Rolling Stones’ plans to perform in Japan during their forthcoming tour.
Elvis Presley’s Aloha From Hawaii Via Satellite television special is broadcast in over 40 countries around the world.
Grateful Dead bassist Phil Lesh is arrested for drug possession at his Marin County home.
18 January – The Rolling Stones’ benefit concert for Nicaraguan earthquake victims raises over $350,000. On December 22, 1972, an earthquake destroyed Managua, the capital of Nicaragua.
20 January 1973, Mike Curb serves as master of ceremonies and chairman of the Nixon Youth Inaugural Concert in Washington, DC…The events performers included Solomon Burke, Tommy Roe, Jimmy Osmond, Ray Stevens, The Sylvers, Don Costa Orchestra, Laurie Lee Schaefer, The Mike Curb Congregation and The Mob (Chicago band) and Mike Curb himself.
21 January – The Rolling Stones open their Pacific tour of Hawaii, Australia and New Zealand in Honolulu, Hawaii.
30 January – Kiss perform their first concert, at the Coventry Club in Queens.
2 February – The Midnight Special makes its début as a regular series on NBC. Helen Reddy is the featured artist.
14 February – David Bowie collapses from exhaustion after a performance at New York’s Madison Square Garden.
18 February – The King Biscuit Flower Hour is first broadcast with performances by Blood, Sweat & Tears, The Mahavishnu Orchestra, and new artist Bruce Springsteen.
Leonard Bernstein conducts Pyotr Ilyich Tchaikovsky’s Violin Concerto for the first time in his career, with soloist Isaac Stern and the New York Philharmonic Orchestra.
The Joffrey Ballet’s Deuce Coupe Ballet opens. The ballet is set entirely to music by The Beach Boys.
Pink Floyd releases The Dark Side of the Moon, which goes on to become one of the best-selling albums of all time. The album debuts on the Billboard 200 on March 17, reaches #1 on April 28, and eventually logs the all-time record of 741 weeks on that chart.
5 March – Jimi Hendrix’s former personal manager, Michael Jeffery, is killed in a plane crash. Jeffery was travelling from Majorca to England. All passengers on board the plane were killed.
6 March – The New York Office of the US Immigration Department cancels John Lennon’s visa extension five days after granting it.
7 March – The director of talent acquisition at Columbia Records, John H. Hammond, suffers a non-fatal heart attack following a performance by one of his most recent finds, Bruce Springsteen.
8 March – Paul McCartney is fined $240 after pleading guilty to charges of growing marijuana outside his Scottish farm.
14 March – The singers Stephen Stills and Véronique Sanson are married near Guildford, England.
24 March – Lou Reed is bitten on the buttocks by a fan during a concert in Buffalo, New York.
2 April – Capitol Records releases two collections of The Beatles’ greatest hits, The Beatles 1962-1966 and The Beatles 1967-1970 (commonly referred to as the “Red Album” and the “Blue Album”, respectively).
7 April – In Luxembourg, the 18th Eurovision Song Contest is won by Luxembourg for the second consecutive year, this time with “Tu te reconnaîtras”, sung by Anne-Marie David. Spain finish in second place with “Eres Tú”, sung by Mocedades; the United Kingdom finish third with Cliff Richard singing “Power to All Our Friends”. The top three placed songs become international hits.
8 April – Opening of the first La Rochelle Festival of Contemporary Music, under the direction of Claude Samuel. Featured composers include Karlheinz Stockhausen and Iannis Xenakis
13 April – The Wailers’s fifth studio album, Catch a Fire, was released under Island Records to critical acclaim. Becoming one of the biggest albums of the reggae genre, it established the Wailers and Bob Marley.
15 April – Tenth Royan Festival of International Contemporary Art begins, including concerts featuring music by Jean Barraqué and Horațiu Rădulescu, amongst others.
16 April – Paul McCartney’s first solo television special, James Paul McCartney, airs on ABC. The special includes performances by McCartney and Wings.
18 April – Violinist Jascha Heifetz deposits parts from his prized Guarnerius violin in the newly poured wet concrete of the foundation for the new Virginia Ramo Hall of Music, under construction at the University of Southern California, in order to ensure the building will be “in tune”, and to bring luck. – Wikipedia