If you happen to change the Windows Time Zone settings AFTER Central Administration has been provisioned, you will see that the time zone/date format is not updated in the administration pages:
Luckily, the fix is quite easy. You can just update the Regional Settings of the Central Administration site. Since this option is hidden from the Site Settings, you’ll have to navigate to it manually:
http://[centraladministration/_layouts/regionalsetng.aspx
Here’s a sample of setting it to Brussels time zone and Dutch Locale:
As you can see only the Time Zone is taken into account while format is still using US Locale. This only applies for certain Administration Pages such as Search Administration. The “Timer Job Status” page for example shows the specified (Dutch) format:
