Khwarizmi Day · Ruz-e Kharazmi

Culture of origin: Iranian · Cultural

Holiday sources: Iran

Muhammad ibn Musa al-Khwarizmi (c. 780 – c. 850), a mathematician of Persian descent from Khwarazm, worked at the House of Wisdom in Baghdad. His book Al-Jabr gave the first systematic solution of linear and quadratic equations, and its title gave us the word algebra; Latin translations of his work brought the Indian decimal numerals to Europe. Iran also marks 22 Tir as National Information Technology Day.