Marwadi et al. 2025. Reforming the Islamic Calendar and Religious Authority: Dynamics of Hijri Calendar Calculation in Indonesia within Persatuan Islam’s Thought. Al-Manahij: Jurnal Kajian Hukum Islam. 19, 1 (Jun. 2025), 149–170. DOI:https://doi.org/10.24090/mnh.v19i1.10574.