Server-Sent Events publication history Date Status 28 January 2021 Retired 3 February 2015 Recommendation 9 December 2014 Proposed Recommendation 11 December 2012 Candidate Recommendation Snapshot 23 October 2012 Last Call Working Draft 26 April 2012 Last Call Working Draft 20 October 2011 Working Draft 10 March 2011 Last Call Working Draft 8 February 2011 Working Draft 22 December 2009 Last Call Working Draft 29 October 2009 Working Draft 23 April 2009 Working Draft