How to modify the date format

Depending on the langauge chosen from the login dialog, the format of the dates will be different. The nl is obviously a european format, while the en is actually en-us.
For customers in europe who might want to use a european format dd/mm/yyyy in combination with the en language what can be done?
Thank you.
Sylvaon on behalf of Marnix Kok.

See item 'Configurable dateformat' in http://www.onehippo.org/cms7/support/forums.html:

<quote>
Depending on the language one uses to log into the CMS a number of
things change, the date format used by datepicker being one example.
When one logs in using the "en" option in the loginscreen the dateformat
changes to mm-dd-yyyy.

We would prefer to have dd/mm/yyyy for "nl" as well as "en" as it is
considered to be the standard in Europe. Is it possible to customize the
date format per language?
</quote>