Maybe the answer I got to  similar question will help:

dukesb11 wrote Most of the templates define the date formats.  You'll have to edit the templates to use UK-gb style dates.  For example, in Templates/default/template.xml, you'd need to change the Dateformat Value element:                              Dateformat                 dd/MM/yyyy @ hh:mm

Maybe you could try                

Dateformat
dd.MM.yyyy @ hh:mm

Regards

Julian

In your template.xml you can set it up for multiple language formats.

<Object>    <Token>[CREATEDDATE]</Token>    <Settings>       <Setting>          <Name>Dateformat</Name>          <Value>ddd MM/dd/yyyy @ hh:mm</Value>       </Setting>       <Setting>          <Name>Dateformat-en-AU</Name>          <Value>dd/MM/yyyy @ hh:mm</Value>       </Setting>    </Settings> </Object>

In that example anyone with their language set for AU (Australia?) would get a day/month/year format while everyone else would get month/day/year.