This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
you need an NTP server on the network and an NTP client on your PC. If you have that, it's quite possible. I synched my PC clock at home with my ISP until they shut down the service for example (guess they needed the bandwidth to handle spam).