his Day in Auto History:

T 4.18.1906 The factory of the Sunset Automobile Company is destroyed by fire as a result of the San Francisco, CA earthquake - production of the Sunset never resumed, although the firm was not legally dissolved until 1909 4.18.1928 The Hispano-Suiza driven by Charles Weymann and Robert Bloch defeats the Stutz Black Hawk driven by Tom Rooney and Gil Anderson in a match race staged at the Indianapolis Motor Speedway 4.18.1940 Racer Gordon Spice is born in London, England 4.18.1949 Archibald M. Maxwell of the Standard Oil Company of Ohio dies at age 53 4.18.1955 The Ford Motor Company splits its Lincoln-Mercury Division into two separate divisions and establishes the Special Products Division

Source: Automobile History Day By Day, by Douglas A. Wick