What was the name of the first major panic day in the 1929 Wall Street Crash?

The first major panic day in the 1929 Wall Street Crash was known as Black Thursday.

Black Thursday occurred on October 24, 1929, when unusually heavy selling hit the New York Stock Exchange. The Dow Jones Industrial Average fell almost 12% during the session, although a group of major bankers later bought shares to stabilize prices temporarily.

The respite did not last. Selling returned the following week, producing Black Monday on October 28 and Black Tuesday on October 29. Those later sessions caused even larger losses and made the crash an international symbol of financial panic.

Black Thursday is sometimes mistaken for the crash’s final or worst day because it began the dramatic sequence of named trading days. The terms refer to individual sessions, not separate crashes. The market’s collapse was connected to speculation and margin buying, but the crash alone did not mechanically cause every feature of the Great Depression.