Studi Komparasi Konsep Kalender Hijriyah Global Tunggal (KHGT) Muhammadiyah dan Kriteria Neo Mabims di Indonesia

Perspektif Fiqh dan Astronomi

Abstract

Differences in the determination of the beginning of the Hijri month is still a phenomenon that often occurs in Indonesia. This situation is increasingly complex with Muhammadiyah's decision to switch from the Wujudul Hilal method to the Single Global Hijri Calendar (KHGT) system at the beginning of 1446 AH. This research examines the comparison between KHGT and the Neo MABIMS criteria used by the Indonesian Ministry of Religious Affairs, in terms of fiqh and astronomical perspectives. This research attempts to answer two main questions: (1) How is the comparison of KHGT and Neo MABIMS criteria in terms of fiqh and astronomy? (2) What are the implications of the application of these two methods for the determination of the beginning of the Hijri month in Indonesia? Through a qualitative approach with comparative analysis, this research integrates data from ephemeris calculations, KHGT Muhammadiyah, and fiqh studies based on the book Fiqhul Islami wa Adillatuhu. The results reveal fundamental differences in the parameters used: KHGT applies global matlak with a requirement of 8° elongation and 5° hilal height, while Neo MABIMS uses matlak wilayatul hukmi with a parameter of 3° height and 6.4° elongation. This difference has implications for KHGT's tendency to set the beginning of the month earlier, which has the potential to affect the determination of Islamic holidays. However, the fiqh analysis shows that both methods have a foundation that can be accounted for in the perspective of Islamic law. This study recommends the importance of continuous dialogue between various parties to reach a broader agreement in the determination of the Hijri calendar in Indonesia, by comprehensively considering fiqh and astronomical aspects.