The "Summer of Love" refers to the summer of 1967, when around 100,000 young people gathered in San Francisco to celebrate peace, love, and music. This cultural phenomenon was characterized by the rise of the hippie movement, which embraced alternative lifestyles, communal living, and psychedelic experiences. During this time, iconic music festivals and events, such as the Human Be-In and the Monterey Pop Festival, showcased influential artists like Janis Joplin and The Grateful Dead. The movement also promoted social change, including civil rights and anti-war activism, leaving a lasting impact on American culture.