On July 9, 1978 , Washington, DC was the site of a massive march in support of the Equal Rights Amendment. This amendment to the constitution stated:
“Section 1: Equality of rights under the law shall not be denied or abridged by the United States or by any state on account of sex.
“Section 2: The Congress shall have the power to enforce, by appropriate legislation, the provisions of this article.
“Section 3: This amendment shall take effect two years after the date of ratification.”
https://feminist.org/blog/index.php/2014/07/09/july-9-1978-feminists-make-history-with-biggest-ever-march-for-the-equal-rights-amendment/