timeserver
n//ˈtʌɪmˌsəːvə//kappvändare, myglare, opportunist, väderhane, ögontjänare, tidsserver, tidssignal
A person who conforms to current opinions, especially for reasons of personal advantage; an opportunist. [from 16th c.]
(computing) A device, node or program that transmits the correct time to clients in a network.