12Sep 2014 Penguin update timeline by penguinadmin ⋅ Leave a Comment Here is a list of approximate dates when the penguin update happened. 1st Penguin update – April 12 2012 2nd Update – October 5, 2012 3rd Update – May 22, 2013 4th Update – October 4, 2013 5th Update October 18, 2014 Posted in: Penguin Update ⋅ Tagged: Google Penguin update, Latest penguin update, penguin update, Penguin update timeline