I joined in last year.
It's the perfect day to tell a story about an innovative woman in science or tech, whether a famous person or someone you know! As Suw wrote:
"Women’s contributions often go unacknowledged, their innovations seldom mentioned, their faces rarely recognised. We want you to tell the world about these unsung heroines, whatever they do. It doesn’t matter how new or old your blog is, what gender you are, what language you blog in, or what you normally blog about – everyone is invited."
So join in!