International Day of Women in Mathematics · Ruz-e Zanan dar Riyazi

Culture of origin: Iranian · International

Holiday sources: Iran

The May12 initiative celebrates women in mathematics each year on 12 May, Maryam Mirzakhani's birthday, and is one of the initiatives set up in her memory after her death in 2017. It gathers local and virtual events, mostly from universities, held between 1 May and 15 June; in 2026 there were more than 200 events in over 60 countries. Women-in-mathematics groups worldwide coordinate it, including the Women's Committee of the Iranian Mathematical Society.