April 22nd1961: Performance at the Top Ten Club, 136 Reeperbahn, Hamburg, Germany.
1962: Star-Club, Grosse Freiheit, Hamburg, West Germany.
1963: The BBC aired the episode of “Side by Side” recorded on April 1st.
1964: The “Please Please Me” LP began its 57th week in the Top 10 of the New Musical Express chart. On the same chart, “With the Beatles” started week 22 in the Top 30 while “Can’t Buy Me Love” was in its 5th week in the Top Ten.
1964: Filming: A Hard Day's Night
The Beatles were filmed this morning descending the iron staircase at the back of the Hammersmith Odeon, which became the beginning of one of two Can't Buy Me Love sequences in the A Hard Day's Night film. In the afternoon The Beatles remained in west London for more filming. The first was a scene shot in St Luke's Road in Notting Hill Gate, where they were chased by police. Afterwards Ringo Starr was filmed in Lancaster Road, where he photographed milk bottles, was chased by two female fans, and found refuge in a second-hand clothes store at 20 All Saints Road.
The day's filming ended with an unused scene in which Paul McCartney walked on the Goldhawk Road in Shepherd's Bush, and entered a door signposted 'TV Rehearsal Room'. The door was actually that of the Jack Billings TV School of Dancing, and the shot was to have preceded McCartney's solo sequence with Isla Blair, filmed on 20 April and the following day. BeatlesBible
1964: The Beatles put in an appearance at London's Australia House, plugging their upcoming tour Down Under. As well as munching on Tasmanian apples, Ringo was filmed holding up a map of Australia and chatting with reporters.
http://beatlechat.blogspot.com/search?q=Australia+house


The Australia House is a London landmark which is the home of the Australian High Commission.
1965: “Ticket to Ride” was number 1 on the UK Record Retailer chart.
1965: Filming: Help!
The Beatles were at Twickenham Film Studios on this day for a performance of the title track of their second feature film, Help! The black-and-white sequence was used early on in the film, and was intended to appear as a television appearance. In the film and exasperated Clang, played by Leo McKern, threw darts at the screen while watching The Beatles' performance. The footage, minus Clang, was distributed by NEMS Enterprises to television companies to promote the Help! single, released in July 1965. Also on this day, The Beatles began filming an unused scene featuring Frankie Howerd and Wendy Richard, set in a drama school. Work continued on 23 and 28 April, but the sequence was left out of the final edit.
BeatlesBible.com
The dartless clip:
1966: Recording: Taxman, Tomorrow Never Knows
http://www.beatlesbible.com/1966/04/22/recording-taxman-tomorrow-never-knows/1968: George returns to England from India.
1969: John Lennon changes his middle name to Ono
John Lennon formally changed his middle name by deed poll from Winston to Ono, during a brief ceremony held on the roof of the Apple building at 3 Savile Row, London. The ceremony was carried out before Bueno de Mesquita, Commissioner of Oaths. Lennon had never liked his middle name, which had been given to him during a bout of wartime patriotism.
Yoko changed her name for me. I've changed mine for her. One for both, both for each other. She has a ring. I have a ring. It gives us nine 'O's between us, which is good luck. Ten would not be good luck. Technically, Lennon was unable to lose the Winston from his name, as UK law dictates that a person is unable to fully revoke a name given at birth. As a result, his official name became John Winston Ono Lennon, with the ten 'O's he wished to avoid. Afterwards Lennon and Ono went to EMI Studios at Abbey Road where they recorded the track John And Yoko which became side two of their Wedding Album. BeatlesBible.com
1972: 
Former Beatle John Lennon, right, gestures as he speaks at a peace rally in New York's Bryant Park on April 22, 1972. Standing beside him is his wife, Yoko Ono. The rally and march of some 30,000 persons in New York City is part of a nationwide day of protests and demonstrations against U.S. involvement in the Vietnam War. (AP)
1999: At the Bonhams rock and pop auction in London, John Lennon’s Vox stage organ, used during The Beatles’ performance of I’m Down at Shea Stadium in 1965, is sold for £19,500 ($27,300).
http://history.absoluteelsewhere.net/April/april22.html