They're eleven and a half hours ahead of us.
At the time, Iran was a bigger threat to the US, and giving Iran another strong enemy to worry about would help US in it's machinations against Iran.
It depends entirely on the time period. Perfectly acceptable answers include: the Abbassids, Buyids, Samanids, Khwarezmids, Assassins, Safavids, Qajjars, and Pahlavi Iran.
Assuming that the question refers to Ayatollah Khomeini's departure from Iran from November 4, 1964 to February 1, 1979, he did not leave by choice. He was forcibly exiled by the Muhammad Shah Reza Pahlavi, the monarch of Iran at the time, for having seditious and subversive views.
The US Embassy hostages in Iran.
Iran
The flight time from Brazil to Iran is about 15 hours, 17 minutes.
Iran Standard Time is 3½ hours ahead of Coordinated Universal Time (UTC). Iran Daylight Saving Time is 4½ hours ahead of UTC and is observed from 2 Farvardin through 30 Shahrivar (Persian calendar).
Southeastern Iran at 1:56 AM UTC (5:26 AM Iran Standard Time) on December 26, 2003.
Only time will tell...
Iran and India have their own time zones, which are different than anyplace else in the world.
The March of Time Crisis in Iran - 1951 is rated/received certificates of: USA:Approved
October.
At this point in time (2012) Iran is believed to have no nuclear weapons capability at all. However this could end at any time (at which point Iran would be nuclear weapons capable).
One. Iran is (Greenwich Mean Time) GMT +3.5 hours, ie. 3.5 hours ahead of Greenwich, England.
It is time for détente with Iran.
US has not sold arm directly to Iran since the revolution in 1979. All the American arms that Iran has right now have remained from the old days (Shah's time) or Iran has bought them from the black market.
Jihading Americans