From a New Yorker article by Louis Menand:

Although the boomers may not have contributed much to the social and cultural changes of the nineteen-sixties, many certainly consumed them, embraced them, and identified with them. Still, the peak year of the boom was 1957, when 4.3 million people were born, and those folks did not go to Woodstock. They were twelve years old. Neither did the rest of the 33.5 million people born between 1957 and 1964. They didn’t start even going to high school until 1971. When the youngest boomer graduated from high school, Ronald Reagan was President and the Vietnam War had been over for seven years.

The boomers get tied to the sixties because they are assumed to have created a culture of liberal permissiveness, and because they were utopians—political idealists, social activists, counterculturalists. In fact, it is almost impossible to name a single person born after 1945 who played any kind of role in the civil-rights movement, Students for a Democratic Society, the New Left, the antiwar movement, or the Black Panthers during the nineteen-sixties. Those movements were all started by older, usually much older, people.

To read more click on the following link: https://www.newyorker.com/culture/cultural-comment/the-misconception-about-baby-boomers-and-the-sixties