What happened to the locale setting?
From Joomla! Documentation
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
This is now defined in the language .xml file in the language metadata settings. If you are having locale problems (dates don't appear in your language) you might want to check/edit the entries in the locale tag. Note that multiple locale strings can be set and the host will usually accept the first one recognised.