Starting with version 7 of Identity Manager every culture can be used for front-end applications. To change the format:
Open Designer and select the language of your choice:
Set the option "Select in front-end" to be True then commit the change to database.
Following that, the language format can be selected from any front-end in the Options/Settings dialog (Database | Settings...), e.g.:
Dates will then be displayed in the appropriate (desired) format.