Answer
Serving from August 2, 1981, to August 30, 1981, Mohammad-Ali Rajai was Iran's president for just 28 days. His brief presidency was marked by severe political instability, economic crises, and the ongoing Iran-Iraq War. Rajai's assassination by the Mujahideen-e-Khalq organization further plunged the country into chaos and contributed to the radical shift in Iranian politics that followed.