Timeline of HTML

1. October 1991

   HTML Tags, an informal CERN document listing 18 HTML tags, was first mentioned in public.

2. June 1992

   First informal draft of the HTML DTD.

3. November 1992

   HTML DTD 1.1 the first revision with a version number, an informal draft.

4. June 1993

   Hypertext Markup Language published by the IETF IIIR Working Group as an Internet Draft.

5. 24 November 1995

   HTML 2.0 was published as RFC 1866

6. 25 November 1995

   RFC 1867 (form-based file upload)

7. May 1996

   RFC 1942 (tables)

8. August 1996

   RFC 1980 (client-side image maps)

9. January 1997

   RFC 2070 (internationalization)

10. 14 January 1997

    HTML 3.2 was published as a W3C Recommendation.

11. 18 December 1997

    HTML 4.0 was published as a W3C Recommendation.

12. 24 April 1998

    HTML 4.0 was reissued with minor edits

13. 24 December 1999

    HTML 4.01 was published as a W3C Recommendation

14. 26 January 2000

    XHTML 1.0 was published as a W3C Recommendation

15. May 2000

    "ISO HTML", based on HTML 4.01 Strict was published as an ISO/IEC international standard.

16. 31 May 2001

    XHTML 1.1 was published as a W3C Recommendation.

17. 28 October 2014

    HTML5 was published as a W3C Recommendation.

18. 1 November 2016

    HTML 5.1 was published as a W3C Recommendation.

19. 14 December 2017

    HTML 5.2 was published as a W3C Recommendation.