Marwadi, and Mughni Labib. “The Fiqh of Hisab Rukyat of Modernist Mass Organizations: A Study of Muhammadiyah and Al-Irsyad Al-Islamiyah Thought on the Hijri Calendar”. International Journal of Social Science and Religion (IJSSR) 6, no. 3 (November 10, 2025): 391–406. Accessed June 26, 2026. http://www.ijssr.net/index.php/ijssr/article/view/377.