What was the first day of the 1929 Wall Street crash called after its heavy selling?

The first day of the 1929 Wall Street crash associated with heavy selling was called Black Thursday.

Black Thursday occurred on October 24, 1929, when unusually heavy selling struck the New York Stock Exchange. The Dow Jones Industrial Average fell sharply during the session, and trading volume reached a then-record level. A late-day rally helped limit the closing loss, but the episode damaged confidence in the market.

The panic did not end that day. Prices fell again the following week, most dramatically on October 28 and October 29, which became known as Black Monday and Black Tuesday. The market continued declining after those headline dates, reaching a much lower point in 1932.

Black Thursday should not be confused with the 1929 market’s later Black Tuesday or with other crashes that use similar “Black” labels. The names describe particular trading days, while the Wall Street Crash refers to the broader collapse.