Birth of Maryam Mirzakhani (Iranian mathematician), International Women in Mathematics Day, Ordibehesht 22. This date marks the birthday of Maryam Mirzakhani, a prominent Iranian mathematician. Mirzakhani was the first woman and the first Iranian to receive the Fields Medal, the most prestigious award in mathematics, which she was awarded in 2014. Her achievements have had a significant impact on mathematics and have inspired many women to pursue careers in the field. In 2019, following an initiative by the global mathematics community, Ordibehesht 22 was designated in the Jalali calendar as International Women in Mathematics Day to honor the achievements of women in mathematics and to raise awareness of their contributions. On this day, universities and scientific institutions organize various events to highlight women's participation in mathematics. The observance serves as an opportunity to increase awareness about women's involvement in mathematics and to encourage future generations to engage in this discipline. The birthday of Maryam Mirzakhani stands as a symbol of women's success in science, inspiring many students and young researchers around the world.