This Day In Rock History: June 27th
1966 The Mothers of Invention released their debut studio album Freak Out! on Verve Records. Often cited as one of rock music's first concept albums, the album is a satirical expression of frontman Frank Zappa's perception of American pop culture and the nascent freak scene of Los Angeles. It was also one of the earliest double albums in rock music.
1970 The 3-day Bath Festival of Blues and Progressive Music in Bath, England took place. The line-up included, Santana, The Flock, Led Zeppelin (headlining act), Hot Tuna, Country Joe McDonald., Colosseum, Jefferson Airplane (set aborted), The Byrds (acoustic set), Dr. John, Frank Zappa & the Mothers of Invention, Canned Heat, It's a Beautiful Day, Steppenwolf, Johnny Winter, John Mayall with Peter Green, Pink Floyd, (who premiered their new suite, "Atom Heart Mother", which at that time was announced as the "Amazing Pudding"), Pentangle, Fairport Convention, and Keef Hartley.
1970 The Trans-Continental Pop Festival (better known as the The Festival Express) set off. The tour was unique in that rather than flying to each city, most of the acts travelled on a chartered CN train. Grateful Dead, Janis Joplin, The Band, The Flying Burrito Brothers and Buddy Guy Blues Band all travelled together on the train playing shows in Toronto, Winnipeg, Saskatoon and Calgary.
source: thisdayinmusic