Marwadi, Labib M. 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) [Internet]. 2025 Nov. 10 [cited 2026 Jun. 26];6(3):391-406. Available from: http://www.ijssr.net/index.php/ijssr/article/view/377