Time Signal

A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day.

Read more about Time Signal:  Audible and Visible Time Signals, Electrical Time Signals

Famous quotes containing the words time and/or signal:

    “It is because the public are a mass—inert, obtuse, and passive—that they need to be shaken up from time to time so that we can tell from their bear-like grunts where they are—and also where they stand. They are pretty harmless, in spite of their numbers, because they are fighting against intelligence.”
    —Alfred Jarry (1873–1907)

    “By day thy warning ringing bell to sound its notes,
    By night thy silent signal lamps to swing.”
    —Walt Whitman (1819–1892)