Black Friday (shopping) corner the gold market. When President Grant learned of this manipulation, he ordered the Treasury to release a large supply of gold, which halted the run and caused prices to drop by eighteen percent. Fortunes were made and lost in a single day, and the president's own brother-in-law, Abel Corbin, was ruined. The earliest known use of "Black Friday" to refer to the day after Thanksgiving occurs in the journal, "Factory Management and Maintenance", for November 1951, and again in 1952. Here it referred to the practice of workers calling in sick on the day after Thanksgiving, in order to
Black Friday (1978) guerrillas in Iran, who some believe were agitators. Black Friday is thought to have marked the point of no return for the revolution, and it led to the abolition of Iran's monarchy less than a year later. It is also believed that Black Friday played a crucial role in further radicalizing the protest movement, uniting the opposition to the Shah and mobilized the masses. Initially, opposition and western journalists claimed that the Iranian army had massacred thousands of protesters. The clerical leadership announced that "thousands have been massacred by Zionist troops". The events triggered protests that continued for another four