In which year did Persia change its name to Iran - 1535, 1735, or 1935?

For centuries, the Western world knew the land of Cyrus the Great (Review) as Persia. This officially changed in 1935 when the nation's leader, Reza Shah Pahlavi, formally requested that foreign governments use the country's native name: Iran. This was not simply a rebranding, but a key part of a broader nationalistic movement to modernize the state and redefine its identity on the global stage, moving away from an image associated with an ancient, declining empire.

The distinction between the names is crucial. "Persia" is an exonym, a name given by outsiders (the ancient Greeks)