The Sidang Isbat Sighting Summit
Broadcast live nationally, the Sidang Isbat convenes at the Ministry of Religious Affairs in Jakarta. Over 120 observation posts across the Indonesian archipelago report sighting testimonies verified by regional religious courts.
Harmonizing Hisab and Rukyah
Indonesia historically balanced Muhammadiyah's astronomical calculation (Hisab Hakiki Wujudul Hilal) with NU's physical observation (Rukyatul Hilal). The updated MABIMS standard has united both traditions around sound astronomical science.
Archipelago Time Zone Standardization
Indonesia spans three time zones (WIB, WITA, WIT). The national Islamic calendar date is referenced to Western Indonesia Time (WIB / Asia/Jakarta, UTC+7), with the civil calendar flipping at 12:00 AM midnight.