[2] A precursor to the first official observance came when the oldest national bisexuality organization in the United States, BiNet USA, was founded in 1990.

[3] First officially observed in 1999 at the International Lesbian and Gay Association Conference in Johannesburg, South Africa,[5] Celebrate Bisexuality Day[6] is the brainchild of three bisexual rights activists: Wendy Curry of Maine, Michael Page of Florida, and Gigi Raven Wilbur of Texas.

The Berkeley City Council unanimously and without discussion declared September 23 as Bisexual Pride and Bi Visibility Day.

[11] 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.

[14] Bisexual+ Awareness Week can also potentially be an important opportunity for bisexual+ individuals to help fight feelings of isolation, create more visibility for others who may be exploring their sexuality, meet other bisexual+ people, and become an integral member of the bisexual+ community by coming out or sharing their personal experiences.