Portable Network Graphics (PNG) Specification (Second Edition) publication history Date Status 10 November 2003 Recommendation 20 May 2003 Proposed Recommendation 1 October 1996 Recommendation 1 July 1996 Proposed Recommendation 28 May 1996 Working Draft 11 March 1996 Working Draft 21 February 1996 Working Draft 28 January 1996 Working Draft 26 November 1995 Working Draft