Facebook forgot the web's birthday and now it's trying to pretend it remembered

Look, this is the internet generation - who are people going to believe, Facebook or the actual real inventor? Of course it will be Facebook !

(Hint: https://www.google.ca/search?q=sarcasm)

Poor title; it looks more like the August 23rd misconception was pre-existing and Facebook used poor data, rather than them forgetting and now covering their tracks.