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Bisexuality Day (also called Bisexual Pride Day, Bi Visibility Day, CBD, Bisexual Pride and Bi Visibility Day, and Bisexuality+ Day) is observed annually on September 23 to recognize bisexual people, the bisexual community, and the history of bisexuality.

History
A precursor to the first official observance came when the oldest national bisexuality organization in the United States, BiNet USA, was founded in 1990. It was originally called the North American Multicultural Bisexual Network (NAMBN) and had its first meeting at the first National Bisexual Conference in America.

This celebration of bisexuality in particular, as opposed to general LGBT events, was conceived as a response to the prejudice and marginalization of bisexual people by some in both the straight and greater LGBT communities.

On September 18, 2012, Berkeley, California, became what is thought to be the first city in the U.S. to officially proclaim a day recognizing bisexuals. The Berkeley City Council unanimously and without discussion declared September 23 as Bisexual Pride and Bi Visibility Day.

Tel Aviv-Yafo City Hall lighted with the colors of the bisexual flag on the bisexual visibility day, September 23, 2019

In 2013, on Celebrate Bisexuality Day, the White House held a closed-door meeting with almost 30 bisexual advocates so they could meet with government officials and discuss issues of specific importance to the bisexual community; this was the first bi-specific event ever hosted by the White House.

On September 23, 2013, in the UK, government minister for Women and Equalities Jo Swinson MP issued a statement saying in part, "I welcome Bi Visibility Day which helps to raise awareness of the issues that bisexual people can face and provides an opportunity to celebrate diversity and focus on the B in LGB&T."

In 2021, Pennsylvania governor Tom Wolf became the first governor in the United States to issue a statement recognizing Bisexual Pride Day.