It's happened every year since 1999, but I didn't even know until two minutes ago that Bi-Visibility Day existed - so much for the visibility part of that then!
Anyway instead of concentrating on what I was supposed to be doing I found myself browsing the web for articles and here are some good ones I found:
Ignoring the B in LGBTQI denies us our identity by Vonny Moyes in The National
Why I don't like being asked which gender I prefer by Zachary Zane on Bustle
There's even a bi pride flag (which I wasn't aware of until just now).
And remember, if you're bisexual, this is the day your invisibility cloak doesn't work, so no trying to rob a bank....