You may find that the date format is set to US date conventions of MM/DD/YYYY by default.
To change the date format (e.g. to UK format), select the cog icon in the very top right of the screen
Select the Formats tab from the menu in the Personalization Settings dialogue box.
In the Current Formats subsection, select English (United Kingdom) from the dropdown menu.
Select OK to save the settings. Your dates will now show in UK format.