Question

what is black thursday

Answer 1

the 1929 crash

The Wall Street Crash of 1929, also known as Black Tuesday (October 29),[1] the Great Crash, or the Stock Market Crash of 1929, began on October 24, 1929 ("Black Thursday"), and was the most devastating stock market crash in the history of the United States (acting as the most significant predicting indicator of the Great Depression),