Yesterday, September 11th 2012, marked the 20th anniversary of the first appearance of Harley Quinn!
As you all know, Harley first appeared on Batman The Animated Series in the episode 'Joker's Favor.' That episode originally aired September 11th 1992.
Goddamnit that means I'm old.
But thankfully Harley is a spry 20!
Paul Dini, Harley's co-creator (along with Bruce Timm) tweeted this yesterday:
"Hard to believe it's been 20 years since Bruce and I unleashed this little minx on the world. Happy "Birthday", HQ"
It is hard to believe indeed.
Happy Birthday Harley!