You can choose the date format you want in the “Preferences” section of your Profile.
By choosing the language (English or French) you can specify the geographic area to which a date format corresponds.
For example: you can choose the English date format in the English language, which is different from the American date format in the same language.
This allows European English speakers to display a date format that is natural to them.
The chosen format will of course be applied throughout the whole application.