What was the 1929 Wall Street crash’s first major trading day called?

The first major trading day of the 1929 Wall Street crash was called Black Thursday.

Black Thursday occurred on October 24, 1929, when heavy selling overwhelmed the New York Stock Exchange. The Dow Jones Industrial Average fell sharply, and trading volume reached a then-record level. A group of major bankers attempted to restore confidence by buying leading shares, temporarily calming the market.

The panic returned the following week. Black Monday came on October 28, followed by Black Tuesday on October 29, when the Dow suffered another dramatic decline. The crash did not single-handedly cause the Great Depression, but it intensified financial stress, reduced confidence, and exposed weaknesses created by speculation, margin buying, and excessive leverage. A common mix-up is treating Black Thursday as the whole crash; it was the first major panic day in a longer collapse that continued into 1932.