Note: You are currently viewing documentation for Moodle 2.0. Up-to-date documentation for the latest stable version is available here: Location.
Location: Administration > Location > Location settings
This sets the default time zone for date display. This can be overridden by a user's profile setting unless the default time zone is forced.
Select your country so that it appears by default on the new account page.
IP address lookup
You can experiment to find out which works better for your area - hostip or ipatlas.