First of all, the wizard will make two suggestions as to the
internal time configuration.
Click on the Modify icon relative to what you
want to setup:
Date and Time: if you do not have a NTP server, click on the Modify
button to manually set the current date and time on the machine.
Time Zone and NTP Server Address: click on the Modify button under
the NTP Server Address (optional) field to indicate the physical
location of the server, and eventually set up a time server, which
would automatically set the system's date and time.