Welcome to the Documentation Library for the Network Time Protocol (NTP) Project.

NTP is a protocol designed to synchronize the clocks of computers over a network to a common timebase. The NTP Project produces a software reference implementation of the NTP protocol standard, maintains the implementation documentation, and develops the protocol standard that is used to communicate time between systems. The software and protocol specifications produced by the NTP Project keep the clocks right on billions of devices around the world. And also in space.

Network Time Foundation provides support for the NTP Project and hosted the mailing lists for the IETF NTP Working Group for many years. Learn more about the Foundation’s work at https://www.nwtime.org.