1966
- Resurgence magazine first published in UK. Contributors have included E.F. Schumacher, Ivan Illich, R. D. Laing and The Dalai Lama.
- January 21–23: Family Dog "Trips Festival" attended by 10,000 in San Francisco.
- March 11: Timothy Leary is sentenced to 30 years on his 1965 border drug offense.
- April 7: Sandoz, the sole legitimate manufacturer of pharmaceutical-grade LSD, stops supplying the drug to researchers.
- April 16: Timothy Leary is arrested for possession of marijuana.
- June 27: Freak Out!, often called the first psychedelic concept album, is released by the Mothers of Invention (led by Frank Zappa).
- June 30: The National Organization for Women (NOW) is founded in Washington, DC.
- July: Beatle backlash: thousands burn records after spread of John Lennon's "more popular than Jesus now" comment.
- July: Donovan’s Sunshine Superman contains the first open reference to LSD “tripping” in a chart-topping song.
- August 3: Lenny Bruce is found dead at age 40 from a morphine overdose in Los Angeles.
- August 5: Revolver is released by The Beatles, and includes John Lennon's groundbreaking psychedelic track Tomorrow Never Knows.
- September: Timothy Leary begins his "Turn-on, Tune-In, Drop-Out" crusade in New York City.
- September 12: American TV's answer to The Beatles, The Monkees debuts on NBC.
- October 6: LSD is banned in the U.S. The events surrounding the ban are portrayed on U.S. TV the following Jan. 12 in the debut episode of the police drama Dragnet '67.
- October 6: Love Pageant Rally protest held in San Francisco.
- October 10: The Beach Boys release Brian Wilson's psychedelic tour de force Good Vibrations.
- October 15: The Black Panther Party is established in Oakland, CA.
- December 8: MGM releases the British film Blow-Up without approval of the movie ratings group MPAA, signalling the beginning of the end of enforcement of the Hays Code.
Read more about this topic: Counterculture Of The 1960s, Chronology of Events and Milestones, 1960s