The Indian Head Test Pattern is a visual test card that was used in television broadcasting, primarily in the United States, from the 1930s to the 1970s. It features a stylized image of a Native American chief, surrounded by geometric shapes and lines. This pattern was used to calibrate television sets and ensure proper alignment and color reproduction. The test pattern was typically broadcast during off-air hours, signaling that the station was not currently transmitting regular programming. It served as a standard reference for technicians and viewers alike, helping to maintain the quality of television broadcasts and improve the viewing experience.