Not wanting to raise the dead with this post, but I thought it worth mentioning so I signed up to SO specifically to clarify, since Ollie314 saved me a lot of time.
The format ollie314 used is correct (for version 7.1+ at least) BUT just to be clear, if it's not displaying correctly it may be due to your system locale settings, if outside of USA. Be sure to include <#setting locale="en_AU"> (replace en_AU with your locale id) in the template you are editing, prior to the date?date?string cast declaration, or it will not work. If you place it in the user settings it won't cast the date string in the template and you will generate errors in your template output.
The documentation from Netbeans isn't particularly clear on that. Still, best IDE ever :)