Marwadi and Labib, M. (2025) “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(3), pp. 391–406. doi: 10.53639/ijssr.v6i3.377.