Network Time Protocol (NTP): http://www.ntp.org/ntpfaq/NTP-s-def.htm is a protocol that is used to query and synchronize the clocks of the computers connected to the internet. In this recipe, we will be using ntplib (https://pypi.python.org/pypi/ntplib/), a Python module that offers an interface to query the NTP servers, to learn about the NTP servers, you may use http://www.pool.ntp.org/en/use.html which finds the closest NTP server for you to synchronize your server clock. It also gives guidelines on contributing your computing resources as an NTP server.