Nyan's 1st Birthday at 21st Street Games Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Tap to play or pause GIF Via 21stgames.tumblr.com April 2, 2011: Nyan Cat was BornApril 5, 2011: The YouTube video aired and the WORLD. KNEW. NYAN CAT.Thursday, April 5th, 2012 we’re throwing a birthday party for Nyan Cat at 21st Street Games. This event is at 4:30 on USTREAM at http://www.ustream.tv/channel/nyancatadventure. We’ll have cake, a piñata, lots of Nyan Cat Adventure game playing, Prguitarman (Chris Torres) in attendance and a special surprise!Download Nyan Cat Adventure on iOS and Xbox Indies, and tune in to USTREAM at 4:30pm eastern for a special surprise! Via 21stgames.tumblr.com Birthday poster for Nyan Cat.