What 1929 Wall Street crash day occurred on October 24, before Black Tuesday?

The October 24, 1929, Wall Street crash day before Black Tuesday was called Black Thursday.

On Black Thursday, heavy selling caused the Dow Jones Industrial Average to fall sharply soon after the New York Stock Exchange opened. The market recovered much of the decline after a group of bankers, led by Richard Whitney, publicly bought shares to support prices. That intervention created a temporary sense of calm.

The relief did not last. Selling returned on October 28, known as Black Monday, and intensified on October 29, known as Black Tuesday. Those sessions turned a severe correction into the most famous U.S. stock-market crash of the twentieth century.

The 1929 crash followed years of speculation, widespread use of borrowed money, and high share valuations. It helped deepen the economic downturn but was one part of a broader chain of banking, industrial, and international problems. Black Thursday is therefore an opening milestone in the crash, not its final day.