VMS Help TCPIP Services, NTP  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The Network Time Protocol (NTP) provides a means to synchronize
    time and coordinate time distribution throughout a TCP/IP
    network. NTP aims to provide accurate and dependable timekeeping
    for hosts on TCP/IP networks.

    NTP provides synchronization traceable to clocks of high absolute
    accuracy and avoids synchronization to clocks keeping incorrect
    time.

    Configuring and managing NTP on your OpenVMS host involves the
    following tasks:

    o  Determining which network hosts to use for synchronization

    o  Creating and populating the NTP configuration file with the
       list of participating hosts

    o  Defining a time-zone differential (offset) logical name

    o  Using the NTPDATE program to set the local date and time

    o  Using the NTPTRACE utility to determine the source from which
       an NTP server obtains its time

    o  Using the NTPDC query program to make runtime changes to NTP