Celebrate Bisexuality Day (23.09.)

Celebrate Bisexuality Day (also called Bisexual Pride Day, Bi Visibility Day, CBD, Bisexual Pride and Bi Visibility Day, and Bisexuality+ Day) is observed on September 23. This day is a call to recognize and celebrate bisexual history, bisexual community and culture, and all the bisexual people in their lives.

https://en.wikipedia.org/wiki/Celebrate_Bisexuality_Day