The name change was officially announced on March 21, 1935, and it was a pretty big shock to the rest of the world. The International Community was like, "Wait, what? You're changing your name?" But Reza Shah was all, "Yeah, we're doing this!" And, just like that, Persia became Iran. It's kinda like when you decide to change your hairstyle - it's a big deal, but you gotta own it!
Now, you might be wondering, why the name change happened in the first place. Well, it's because Reza Shah wanted to emphasize the country's Aryan heritage. He believed that the name Persia was too closely associated with the Achaemenid Empire, which was ancient history, and he wanted a name that reflected the country's modern identity. It's like when you want to rebrand yourself - you gotta find a name that fits your vibe!