In determining the beginning of month Hijri calendar, Indonesian government has used criterion crescent visibility (Imkan ar-Rukyat) adopted from MABIMS agreement. This three conditions. Namely, should be at least 20; elongation is minimum 30; age must more than eight hours after conjunction. August 2016, made a great deal to revise this criterion. The new two 30, and 6,40. planned apply in Ind...