This KB details the steps to take to change from a US-style date format to a European-style date format
The appliance is showing dates for backups in the following format: mm/dd/yyyy
1. Click on the gears icon at the top of the web GUI:
2. Select SET LANGUAGE, on the dialog which appears change the language to "Europe English (en-gb)"
3. Click "Apply" and refresh your browser tab to confirm the date format changed.