1. Open your web browser and enter the IP address or hostname of your server suffixed with port 10000 in the address bar (ex. http://192.168.1.115:10000) then press enter.
2. At the login screen enter the user root, the default password is FVasterisk!.
3. Click the Hardware tab on the left side of the screen.
4. Then click the System Time link.
5. Set the correct system time using the drop down menus.
6. Click apply under System Time to apply the settings.
7. Ensure the Hardware Time is the same as the System Time. To set the Hardware Time to the correct System Time click the Set hardware time to system time button.
8. Make sure the correct Time Zone is set for the Server.
9. To synchronize the Server Time with a Timeserver, enter the Timeserver IP address in the Timeserver hostname field. To sync the times on a repeated schedule, check the Yes option under Synchronize on schedule, otherwise the time will only be synced once. Set the schedule if needed, then click the Sync and Apply button.
10. Your time should now be updated! You may close the Webmin window.

Webmin is a web based server configuration tool. It allows users to easy change server settings like the server time and date, as well as the server networking configuration and other settings.