1966: Pot or LSD? Revolver!

The year began with the news that the Rolling Stones signed a five-year deal with Decca worth 1 miljon pund!
The American radio banned Bob Dylan's "Rainy Day Women No's 12 & 35" and The Byrds "Eight Miles High" for the songs "drug content". Dylan also released his double album "Blonde On Blonde".
The 23 year old Pop Genius, Brian Wilson(Beach Boys) released the album Pet Sounds and the single "Good Vibrations"..reviewed by Melody Maker:"...instrumentally the track is quite brilliant, no symphony was ever scored with more inspiration or patience." The Beach Boys made a sell-out tour to Britan in the fall of the year.

January:

The Beatles: "We Can Work It Out". 3rd Triple chart-topper:U.K./U.S./Australia
David Jones changes his last name to Bowie
The Lovin' Spoonful - "You Didn't Have To Be So Nice" (US Chart)

February:

Release of the Yardbirds: "Shapes of Things" / "You're a Better Man than
Pink Floyd begin the first of their performances in Soho, with the line-up of Syd Barrett, Nick Mason, Roger Waters and Rick Wright.
At the Fillmore: Jefferson Airplane and Big Brother and the Holding Company(Janis Joplin)
The Cavern Club in Liverpool closes
The Kinks - Kink Kontroversy is released

March:

Release of the Who's "Substitute" / "Waltz for a Pig"
The Yardbirds: "Shapes of Things" reach 3rd at UK charts
Pink Floyd introduce a light show with psychedelic effects
The Lovin' Spoonful - "Daydream" (US Chart)
Pink Floyd performances at the Marquee("Spontaneous Underground") Sunday afternoons
Buffalo Springfield is formed by Neil Young and Stephen Stills in Los Angeles
John Lennon is saying that the Beatles was more popular than Jesus
The Byrds release "Eight miles high"

April:

Spencer Davis Group hits UK#1 with "Somebody Help Me"
The Lovin' Spoonful make their British debut at Marquee Club
The Troggs: "Wild Thing" / "From Home" is released
John Mayall and the Bluesbreakers with Eric Clapton recording at Decca
The first Rolling Stones album of original compositions, Aftermath is released

May:

The Rolling Stones, "Paint It, Black" / "Long Long While" is released
The Yardbirds. "Over Under Sideways Down" / "Jeff's Boogie" is released
The Byrds - "Eight Miles High" (US Chart)
The Lovin' Spoonful - "Did You Ever Have To Make Up Your Mind" (US Chart)
Brian Wilson(Beach Boys) begins to work on the track "Good Vibrations"
The Beach Boys - Pet Sounds is released

June:

Keith Moon(The Who) begins using two bass drums in concerts at Grona Lund, Stockholm, Sweden, see pic in the Concertpages!
Release of The Kinks "Sunny Afternoon" / "I'm Not Like Everybody"
The Beatles: "Paperback Writer" / "Rain" UK release
Eric Clapton, Jack Bruce and Ginger Baker form the Cream
Cyrkle - "Red Rubber Ball" (US Chart)
The Yardbirds Paul Samwell-Smith is replaced with Jimmy Page
The Rolling Stones beginning a US tour

July:

Chas Chandler spotted Jimi Hendrix(playing with Jimmy James and the Blue Flames) at the Cafe Wha in New York
Terry Knight & The Pack(Grand Funk) - "Change on the Way" WKNR(US) #14
The Byrds - Fifth Dimension is released

August:

Beatles begins their North American tour
The Beatles hits UK#1 with "Yellow Submarine" / "Eleanor Rigby"
The Lovin' Spoonful - "Summer In The City" (US Chart)
The Beatles - Revolver is released

September:

The Doors record an acetate in Los Angeles
John Mayall's Bluesbreakers release "Parchman Farm" / "Key to Love"
Release of The Rolling Stones: "Have You Seen Your Mother, Baby, Standing in the Shadow?" / "Who's Driving Your Plane"
The Rolling Stones perform at the Royal Albert Hall for a live recording
Jimi Hendrix arrives in London and start auditions for his new band, Noel Redding is one
? (Question Mark) & The Mysterians - "96 Tears" (US Chart)
Paul Butterfield Blues Band - East-West is released

October:

Mitch Mitchell starts to play with Jimi Hendrix
The Cream release "Wrapping Paper" / "Cat's Squirrel"
The Yardbirds: Jimmy Page has replaced Jeff Beck on guitar
The Yardbirds release: "Happenings Ten Years Time Ago" / "Psycho Daisies"
Count Five - "Psychotic Reaction" (US Chart)
Pink Floyd and the Soft Machine perform at the International Times "All Night Rave" at London's Roundhouse
Jimi Hendrix plays concert
The Beach Boys release "Good Vibrations", which took six months to complete and a big sum of money!

November:

The Spencer Davis Group UK#2 with: "Gimme Some Loving", introducing 17 year old singer/pianist Steve Winwood
The Beach Boys, "Good Vibrations" hitsUK #1
The Lovin' Spoonful - "Rain On The Roof" (US Chart)
The Kinks release "Dead End Street" / "Big Black Smoke"
The Jimi Hendrix Experience plays their first official concert in the UK
John Mayall(with Eric Clapton) release "All Your Love" / "Hideaway"
The Kinks - Face to Face is released
Terry Knight & The Pack(Grand Funk) - "Who Have Nothing" WKNR(US) #11
The Electric Prunes release "I Had Too Much To Dream"
Pink Floyd records a demo tape with four tracks: "Interstellar Overdrive", "Lucy Leave", "Stoned Alone" and "Silas Lane"

December:

Donovan release: "Sunshine Superman" / "The Trip"
Release of The Who's "Happy Jack" / "I've Been Away"
The Jimi Hendrix Experience release "Hey Joe" in the UK the 15 of Dec
Cream: "I Feel Free" / "N.S.U." release in the UK
"I Can Take You To The Sun" is released by the Misunderstood
Pink Floyd, the Who and the Move performs in London at New Year's Eve
Cream - Fresh Cream is released

Misc:

Robert Plant's first step into the music business
"Wishbone Ash" was formed
LSD declared illegal
Jerry Cantrell(Alice In Chains) is born (March 18)

In Sweden:

"Parsson Sound" is formed during 1966, later changed their name first to "International Harvester" then to "Trad, gras och stenar"
"Hansson & Karlsson", a duo(organ and drums) is formed