The Ministry of Religious Affairs of the Republic of Indonesia will monitor the crescent moon for the beginning of Zulhijah 1447 Hijriah at 88 points spread across Indonesia on May 17, 2026.
The isbat session is scheduled to be held at the H M Rasjidi Auditorium, Ministry of Religious Affairs, Jakarta, coinciding with 29 Dzulqaidah 1447 H.
The Director of Islamic Affairs and Sharia Guidance at the Ministry of Religious Affairs stated that the isbat session will involve various elements, including the government, Islamic organizations, astronomy experts, and other related institutions.
“The isbat session is a joint forum to combine the results of calculations and crescent moon sightings in order to determine the beginning of Dzulhijjah 1447 H accurately and in a way that is acceptable to all Indonesian Muslims,” he said.
According to him, based on calculation results, the conjunction before the beginning of Zulhijah is expected to occur on Sunday, May 17, 2026, around 03:00 Western Indonesia Time.
During the observation process, the position of the crescent moon in Indonesian territory is expected to be above the horizon, with altitudes ranging from 3 degrees to nearly 7 degrees.
Meanwhile, the elongation angle between the moon and the sun is expected to be in the range of 8 to 10 degrees.
The Ministry of Religious Affairs, together with regional offices of the Ministry, Religious Courts, Islamic organizations, the Meteorology, Climatology, and Geophysics Agency, the National Research and Innovation Agency, and various other institutions, will conduct crescent moon observations at various strategic points, including observatories, beaches, building rooftops, and mosque areas.
“Crescent moon monitoring is carried out extensively in various regions of Indonesia so that the observation results obtained are more accurate and can serve as a basis for decision-making in the isbat session,” he said.
For the Banten region, the crescent moon monitoring for the beginning of Zulhijah 1447 H is scheduled to take place at Anyer Beach.

H M Rasjidi Auditorium
Ministry of Religious Affairs, Jakarta
Anyer Beach
H M Rasjidi Auditorium
Ministry of Religious Affairs, Jakarta
Anyer Beach
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