During the so-called 'Summer of Love,' people were encourage to "Turn on, tune in, drop out." What year was it?

While the counterculture movement was burgeoning across the country, San Francisco became the undisputed epicenter of the hippie scene during the summer of 1967. The city was already known as an anti-establishment haven for the Beat Generation of the previous decade, but it was the 'Human Be-In' in January of 1967 that really got the word out. The gathering in Golden Gate Park of 30,000 or so flower children featured some of the movement's best-known figures — including Timothy Leary, who coined the phrase 'Turn on, tune in, drop out' that very day. By that summer, an estimated 100,000 young people had converged in San Francisco's Haight Ashbury neighborhood, all hoping for a taste of the free-love, psychedelic scene.

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