D-Link DIR-640L User Manual page 20

Section 3 - Configuration
Step 6: Select your time zone from the drop-down menu and then click
Next to continue.
Step 7: Your setup is complete. Click Save to continue.
Step 8: You may bookmark the router's web UI by clicking OK. If you do
not want to bookmark the link, click Cancel.
The router will reboot. Please allow 1-2 minutes.
Close your browser window and reopen it to test your Internet connection.
It may take a few tries to initially connect to the Internet.
D-Link DIR-640L User Manual 15