Which 1929 Wall Street Crash day is known as Black Thursday because of its huge selling wave?

Black Thursday, the first major panic day of the 1929 Wall Street Crash, occurred on October 24, 1929.

The New York Stock Exchange experienced exceptionally heavy selling that morning, and the Dow Jones Industrial Average fell sharply. Leading bankers later met and announced a pool to buy selected shares, helping produce a temporary recovery during the afternoon. That intervention did not solve the underlying problems of excessive speculation and weak confidence.

Black Thursday is often confused with Black Tuesday, October 29, the later day that saw an even larger wave of selling. The 1929 crash unfolded over several trading sessions, including Black Monday on October 28, before eventually developing into a prolonged bear market. The episode helped define the financial history of the United States and is closely associated with the onset of the Great Depression.