- Apr 1 NY Mets purchase future Baseball Hall of Fame outfielder Duke Snider from the LA Dodgers for $40,000; Snider had starred for the Brooklyn Dodgers 1947-57
- Apr 1 NYC's newspapers resume publishing after a 114 day strike
- Apr 1 American television soap opera premieres: "General Hospital" (ABC) & "Doctors" (NBC)
- Apr 2 Explorer 17 attains Earth orbit (254/914 km)
- Apr 2 USSR launches Luna 4; missed Moon by 8,500 km
- Apr 5 Beatles receive their 1st silver disc (Please Please Me)
- Apr 5 Susuga Malietoa Tanumafili II becomes chief of Western Samoa
US Masters Golf
Apr 7 27th US Masters Tournament, Augusta National GC: 23 year old Jack Nicklaus wins the first of his record 6 Green Jackets with a 3-foot par putt on the final hole to finish 1 stroke ahead of Tony Lema
Jack Nicklaus
Academy Awards
Apr 8 35th Academy Awards: "Lawrence of Arabia", Anne Bancroft & Gregory Peck win
Event of Interest
Apr 8 Tigers claim young pitcher Denny McLain from the White Sox for $25,000
Denny McLain
Event of Interest
Apr 9 Winston Churchill becomes 1st honorary US citizen
Winston Churchill
Catholic Encyclical
Apr 11 Pope John XXIII publishes encyclical "Pacem in terris", that peace between all peoples must be based on truth, justice, love and freedom
John XXIII
- Apr 11 US performs nuclear test at Nevada Test Site
- Apr 11 Milwaukee Braves future Baseball Hall of Fame pitcher Warren Spahn beats NY Mets, 6-1 for his 328th win; most by a left-hander in MLB history
- Apr 12 Beatles "From Me to You" is released in UK
- Apr 12 Police in Birmingham, Alabama, use dogs & cattle prods on peaceful demonstrators
- Apr 13 Pirate's Bob Friend balks 4 times in a game
Event of Interest
Apr 14 George Harrison is impressed by unsigned group "Rolling Stones"
George Harrison
- Apr 15 "Sophie" opens at Winter Garden Theater NYC for 8 performances
- Apr 15 67th Boston Marathon won by Aurèle Vandendriessche of Belgium in race record 2:18:58
- Apr 18 Dr James Campbell performed the 1st human nerve transplant
- Apr 18 Stanley Cup Final, Maple Leaf Gardens, Toronto, ON: Toronto Maple Leafs go back-to-back with a 3-1 Game 5 win over Detroit Red Wings for a 4-1 series victory
- Apr 19 "Hot Spot" opens at Majestic Theater NYC for 43 performances
Music Single
Apr 19 Johnny Cash releases his single "Ring Of Fire" written by his future wife June Carter and Merle Kilgore
Johnny Cash
June Carter Cash
Event of Interest
Apr 21 Beatles meet The Rolling Stones for the 1st time
Charlie Watts
- Apr 21 The Universal House of Justice of the Bahá'í Faith is elected for the first time
Event of Interest
Apr 22 Lester B. Pearson is sworn in as the 14th Prime Minister of Canada
Lester B. Pearson
Event of Interest
Apr 27 Cuban premier Fidel Castro arrives in Moscow
Fidel Castro
- Apr 28 17th Tony Awards: "Who's Afraid of Virginia Woolf?" and "A Funny Thing Happened on the Way to the Forum" win
Golf Tournament
Apr 29 LPGA Titleholders Championship Women's Golf, Augusta CC: Marilynn Smith beats Mickey Wright by 1 shot in 18-hole playoff
Mickey Wright
- Apr 29 KRE-AM in Berkeley CA changes call letters to KPAT