22 October: Shah Pahlavi arrives in the United States for cancer treatment.
4 November: Aggressive planned demonstrations take place near the Embassy of the United States. About 500 demonstrators climb over the embassy's fence as Iranian police look on. Embassy clerks ask for help from the Iranian government which does not come as promised. Embassy guards defend the compound with tear gas because firearms are not permitted for use. Secret documents are burned in the embassy. About ninety people are taken hostage of which 66 are American.
4 November: 52 hostages are taken to the Ambassador's residence while the embassy remains under the demonstrators' control.
5 November: Iranian government cancels all defense treaties with the United States and the Soviet Union.
7 November: U.S. President Jimmy Carter appoints two former federal officials, Ramsey Clark and William Miller, as delegates to negotiate the end of the hostage crisis. Ayatollah Khomeini refuses to see the delegation.[2]
12 November: Iranian Foreign Minister Abolhassan Banisadr says the hostages will be released if the U.S. deports the Shah back to Iran.
14 November: The U.S. Government freezes the Iranian State bank accounts in the U.S. banks.
17 November: Khomeini orders the release of 8 African-American and 5 female hostages. 53 hostages remain held.
25 March: Shah Mohammad Reza Pahlavi returns to Egypt.
7 April: The U.S. cuts all diplomatic relations with Iran and puts Iran under embargo.
24 April: Negotiations fail and president Carter orders military rescue mission to free the hostages. Rescue fails in the Iranian desert as two helicopters collided. Eight U.S. soldiers die in the accident.
11 July: One hostage is freed for health reasons. 52 hostages are still in the Embassy compound.
12 September: Ruhollah Khomeini puts new terms to release the hostages; the U.S. has to release all of the Shah's currency assets from his American bank accounts. According to the Iranian government, the worth of the foreign assets are about 32 billion U.S. dollars.
10 November – 8 January 1981: U.S. Deputy Secretary of State Warren Christopher's delegation negotiates alongside the Algerian government with a representative from the Iranian government on terms to free the hostages.
1981
19 January: U.S. and Iran sign an agreement over the hostages. Iran releases all of the hostages and U.S. frees 8 billion U.S. dollars of Iranian State assets from American banks.
20 January: U.S. president-elect Ronald Reagantakes the oath of office. Only 20 minutes after Reagan's oath, Iran releases all 52 hostages who are flown to West Germany via Algeria where former U.S. president Jimmy Carter takes them back to the United States.
Ten days after the release of the hostages a motorcycle parade takes place in New York City's Broadway.