Hi,

Here is the answer from the FAQ:

Sometimes you need to change the date format from the default US format (mm/dd/yyyy) to other, e.g. dd/mm/yyyy. Please follow these steps:

1. Go to Site Manager -> Development -> UI Cultures
2. Click 'New UI Culture' and insert for example following values:
UI culture name: British English
UI culture code: en-GB
3. Click OK to save changes.
4. Go to edit user (CMS Desk -> Administration -> Users -> edit the user account you are using) and change 'Preferred user interface culture' to British English (you can make the same setting in CMS Desk -> My desk -> My profile).
5. You may need sign out and sign in back for the changes to take effect.

Please note: the date format on the live site is changed according to the site culture. This culture is set in Site Manager -> Sites -> edit your site -> Default content culture.

Plus, you may need to add this key to your web.config file:

<add key="CMSDefaultUICulture" value="en-gb"/>

Best regards,
Martin Danko