What was the name of the 24 October 1929 Wall Street market collapse?

The 24 October 1929 Wall Street market collapse was called Black Thursday.

Black Thursday marked the first dramatic break in the Wall Street Crash of 1929. Heavy selling drove the New York Stock Exchange sharply lower, although a group of major bankers bought shares in an effort to stabilize prices. The intervention briefly calmed the market, but it did not end the underlying collapse.

The crash continued through the following week. Black Monday came on 28 October, followed by Black Tuesday on 29 October, when trading losses became even more severe. These dates are often grouped together as the Wall Street Crash of 1929.

A common mix-up is treating Black Thursday as the single day of the entire crash. It was the first major panic day, while the broader collapse unfolded over several sessions and contributed to the economic crisis known as the Great Depression.