Ahmad Dahlan was an influential Indonesian Islamic scholar and reformer, born on August 1, 1868, in Yogyakarta. He is best known for founding the Muhammadiyah organization in 1912, which aimed to modernize Islam in Indonesia by promoting education and social welfare. His efforts focused on improving the understanding of Islam and encouraging Muslims to engage with contemporary issues. Dahlan emphasized the importance of education and established schools to teach both religious and secular subjects. He believed that Muslims should adapt to modernity while maintaining their faith. His legacy continues to impact Islamic thought and education in Indonesia today.