Since when is the name (Iran) Is it official?

Changing the name of Persia to Iran

Bozarjamhar Parkhideh : Fourth of April 1313 ( 1935 ad ) The name Pars or Persia, which was called our land, was officially changed to Iran. Previously, the name of our country was called "Persia" or "Pers" in international forums. Still, in some of the earlier books of the foreigner, such a name can be used instead…