2013 Event Pop band One Direction hosts 1D Day, a day consisting of a record, 7.5 hour-long socially interactive live-stream on YouTube and Google+ Hangout including live band performances and celebrity guests; the event was an unprecedented use of social media 1960 Birthday Chuck D, born in Roosevelt, New York, rapper, author, leader, Public Enemy, created politically, socially conscious rap music, focused on hip hop genre, albums include, 'Yo! Bum Rush the Show', 'Fear of a Black Planet' 1908 Birthday Hans Werner Richter, German author, Socially Responsible Cinema 1892 Event Mrs William Astor invites 400 guests to a grand ball at her mansion thus beginning use of "400" to describe socially elite
