The square was formally renamed after a bombing on 28 June 1981 (the 7th of Tir 1360 (Haft-e Tir - هفت تیر) in the Iranian calendar), a powerful bomb went off at the headquarters of the Iran Islamic Republic Party (IRP) in Tehran, while a meeting of party leaders was in progress.
The People's Mujahedin of Iran or Mujahideen al-Khalq is thought to have been responsible for the attack.
Previously Haft-e-Tir was known as 25th Shahrivar Square, which was a name given by the former pre-revolutionary Pahlavi government up until the revolution.
In 2012 Haft-e-Tir again became the scene of large gatherings when thousands of people cheered on president-elect Hassan Rouhani who had just won the country's election with a landslide.
Rouhani also had his main election campaign headquarters of the Karim Khan Street of the square.