User:WikiSysop

• http://www.mediawiki.org/wiki/Help:Configuration_settings
• http://www.mediawiki.org/wiki/Help:FAQ
• MediaWiki release mailing list
• MediaWiki:Sitenotice
• Special:Renameuser
• Special:Allmessages
• SpecialPreferences.php
  • comment out date format

• customisation

languages\messages\MessagesEn.php
//$defaultDateFormat = 'dmy or mdy';
$defaultDateFormat = 'ISO 8601';//tango.info