It was the day the world changed forever, the day the mysterious Genderwave swept around the planet, switching the gender of everyone on Earth.
Many of Lorna Samuel's recaps have been set in the world of the Genderwave, and the first Genderwave story can be read at:
http://tinyurl.com/334yfbIt occurred to me today that had they been interested in that sort of thing, this story would've been ideal for one of DC's Silver Age sci-fi comics. And once it had occurred to me, I had to put together the cover for that issue, of course: