National Engineer's Day is celebrated in Iran every year on February 24. equals to 5 Esfand in Persian Calendar A special commemorating ceremony is held to honor the efforts and achievements of the Iranian engineers. Celebration of National Engineer's Day commemorates the birthday of Nasir al-Din al-Tusi, Persian polymath and prolific writer. He is considered to be one of the greatest Persian scholars of the Islamic Golden Age. In his specialties, he has served the world in which his trigonometry books were translated into French in the 16th century and was one of the exponents of this science. #Engineer_day #News @English_4U