4 September was Eid-e-Fitr, the holiday celebrating the end of the month of Ramadan. A permit for an open air prayer was granted, in which 200,000–500,000 people attended. Instead, the clergy directed the crowd on a large march through the center of Tehran (the Shah reportedly watched the march from his helicopter, unnerved and confused). A few days later even larger protests took place, and for the first time protesters called for Khomeini's return and the establishment of an Islamic republic.
At midnight on 8 September, the Shah declared martial law in Tehran and 11 other major cities throughout the country. All street demonstrations were banned, and a night-time curfew was established. Tehran's martial law commander was General Gholam-Ali Oveissi, who was known for his severity against opponents.
By late October, a nationwide general strike was declared, with workers in virtually all major industries walking off their jobs, most damagingly in the oil industry and the print media. Special "strike committees" were set up throughout major industries to organize and coordinate the activities. The Shah did not attempt to crack down on strikers, but instead gave them generous wage increases.