Websites using ISO 8601

Consistent

• http://www.suphp.org/Home.html
• https://mykolab.com/press
• https://kolabsys.com/
• https://tango.info

Inconsistent

• http://www.postgresql.org/ (50% ISO, rest other)
• https://www.python.org/ - on that page consistent, but if clicking to Upcoming events or Latest news other formats are shown
• https://www.mediawiki.org/wiki/MediaWiki - on this page almost consistent, but the interface message on the bottom says "19 July 2013, at 17:24.". Page history page uses "12:25, 9 June 2013‎ ‎".
  • https://www.mediawiki.org/wiki/Talk:MediaWiki on top "Archives: 1 (by 2005-08-19)", right-hand "15:02, 28 May 2014"