Is it possible to configure Windows 7 to use YYYY-MM-DD instead of DD/MM/YYYY as the date format? How? Where?
Go to Start > Control Panel > Regional and Language Options.
Here you can configure long and short date options on the Formats tab. Click additional settings to customize the formate more under the Date tab
Edit: Updated with more detail:
Changing Date Format in Windows 7
I hope this more detailed answer helps someone in the future. Apologies for the screens as VirtualBox isn't the best with them. Feel free to update with some better ones