The Beatles' album Sgt. Pepper's Lonely Hearts Club Band came to America on 1 June 1967, and changed the world.
As one might imagine, most news organizations have articles about it:
As for me, I received a copy of the LP as a gift probably in 1981, and bought a copy of the CD on 3 November 1988 for $12 (about $25 today). It remains one of my favorite musical compositions—and yes, I'm comparing it to Mozart's Großemesse and Orff's Carminia Burana. And I'm going to listen to it again today.