facebook By cheng Feb 25, 2004 facebook launched to students of Harvard College Mar 25, 2004 Facebook expanded to America Sep 25, 2005 Facebook launched a high-school version Sep 25, 2006 Facebook opened in SEP to everyone over 13 years old Apr 25, 2008 Facebook overtook myspace to become leading social network site Aug 26, 2008 Facebook reachs 100 million members Sep 25, 2009 Facebook first started to make a profit as a social media site Mar 13, 2010 Facebook achieved more visitors than google throughout a week Jul 21, 2010 Facebook reached 500 million members Dec 25, 2011 Facebook ranked second most accessed site in America Mar 25, 2012 Facebook launched it's own app center for iphone and Android phones May 17, 2012 Facebook floats stock on exchange for the first time Oct 4, 2012 Facebook reaches 1 billion members