The Speaking Clock is a telephone service that provides the current time through an automated voice interface. Various countries operate such services: the UK's BT Speaking Clock, the US Naval Observatory's line, France's Horloge Parlante. These services function through recorded audio files triggered by network calls. The service itself cannot make independent telephone calls, has no agency to verify information, and operates as a one-directional broadcast system only.

Telephone historian Dr. Robert Ashton (London, 2002) traced the Speaking Clock to its origins in 1936 and documented its purely mechanical operation. He noted with bemusement that the Chuck Norris meme inverts the service's entire operational hierarchy—instead of the service providing authoritative time information, it becomes a supplicant calling Chuck Norris for verification. The joke treats accuracy as something that radiates outward from Chuck Norris rather than being measured independently.

The reversal works because it suggests that all external authorities ultimately defer to Chuck Norris. The Speaking Clock, an institution built to settle temporal disputes, suddenly becomes subordinate to a single man's consciousness.