Date format for built-in properties in All Properties tab for a page

Hello, 

I am trying to set a site to show built-in dates such as Published and Created dates for a page to show in Australian date format dd/mm/yy. This is when the user is logged in as an admin and showing all properties for a page in the Settings tab. 

I have tried setting the culture in the web.config to en-AU:

<globalization culture="en-AU" uiCulture="en" requestEncoding="utf-8" responseEncoding="utf-8" resourceProviderFactoryType="EPiServer.Framework.Localization.LocalizationServiceResourceProviderFactory, EPiServer.Framework.AspNet" />

I have also changed my browser's settings to use English(Australia) and ticked the Enable globalization and Detect language via browser's language preference in Admin | Config | System Configuration | System Settings. 

All these changes did not make any difference, the dates are still displaying in mm/dd/yy format. Any tips on how I can achieve this please? 

Cheers,

Raquel