Final answer:
Black Thursday refers to the events that happened on October 24, 1929, and is considered the starting point of a series of economic calamities known as the Stock Market Crash of 1929.
Step-by-step explanation:
Black Thursday refers to the events that happened on October 24, 1929, and is considered the starting point of a series of economic calamities known as the Stock Market Crash of 1929. On this day, the stock market experienced a sudden and significant decline in stock prices, leading to panic selling and massive financial losses for investors. The crash affected not only individual investors but also banks, which had invested heavily in the stock market.