Marwadi, and Mughni Labib. 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):391-406. https://doi.org/10.53639/ijssr.v6i3.377.