title: Force old (Plone3) date time formats in Plone 4
body: <p>I want to force (ignore the locales) for the Language files in Plone 4. After a bunch of googling and source code reading I found <a href="https://dev.plone.org/ticket/11171" rel="nofollow noreferrer">an old bug-report</a> that people have the same issue as I had.</p>
  
  <p>While reading this I noticed that they created/modified <a href="https://github.com/plone/Products.CMFPlone/blob/master/Products/CMFPlone/i18nl10n.py#L101" rel="nofollow noreferrer">the i18nl10n.py</a> file. When you look at line 101 I you see that they check if the Products.CMFPlone.i18nl10n.override_dateformat.Enabled checkbox is enabled that it will use the registery values to configure the language settings. </p>
  
  <p>Thus I've done this and expected this to work, but (alas) it did not.
  My Configuration Registery looks like the following:<img src="https://i.stack.imgur.com/PF0oH.png" alt="configuration_registery"></p>
  
  <p>However the time is still shown in American notation:
  <img src="https://i.stack.imgur.com/iEiCW.png" alt="rpm_with_dt_notation"></p>
  
  <p>I have tried to refresh, restart and rerun. Yet nothing seems to yield any result.</p>