1974: “Studio One” opens in West Hollywood. The labyrinthine establishment, one of the biggest of its kind (it has four bars, a dinner theater, a jewelry concession, and a game room), quickly establishes itself as L.A.’s premier gay nightclub, the disco to end all discos, drawing such celebrity regulars as Richard Chamberlain, Bette Midler, Elton John, and Charles Nelson Reilly.

1976: Christopher Street magazine makes its debut. The premiere issue-with contributions from Paul Goodman, Edmund White, Rita Mae Brown, and Elaine Noble-features a cover drawing of an abandoned closet.

1991: Three same-sex couples file suit in Hawaii alleging that the state constitution guarantees their right to marry.

2013: Civil unions becomes legal in Colorado.