“Also called Bisexual Pride Day, Celebrate Bisexuality Day, CBD & Bisexual Pride and Bi Visibility Day, this day is a call for the bisexual community, their friends and supporters to recognize and celebrate bisexuality, bisexual history, bisexual community and culture, and all the bisexual people in their lives.” (part one)(part two - PoC)

EDIT: Jack is described as omni, which John Barrowman has said is the show’s equivalent for bi when it involves aliens, however interpretations of this as meaning he is pan are obviously very valid. Also, this is a mix of characters and real people which I understand may be confusing. Who they are is in the caption.