timeserver
/ˈtaɪmˌsɜrvər/Definitions
1. noun
A device or service that synchronizes the clock of a computer to a more precise time source, usually over the internet.
“The company uses a timeserver to ensure that its financial transactions are processed at the exact time specified.”
2. noun
A person who keeps track of the time, especially in a professional or official capacity.
“The event coordinator acted as the timeserver to ensure that the speakers began on schedule.”