The Chularajmontri Sighting Directive
On the 29th of each lunar month, the Sheikhul Islam instructs provincial Islamic councils, particularly in Pattani, Yala, Narathiwat, and Satun, to observe the horizon and report findings to Bangkok.
Astronomical Collaboration
Working with the National Astronomical Research Institute of Thailand (NARIT), Islamic scholars review physical sightings against scientific crescent altitude models.
Day Transition Dynamics
The civil calendar updates at 12:00 AM midnight Indochina Time (ICT / Asia/Bangkok, UTC+7), while religious observance begins at sunset with the Maghrib prayer.