Publisher: Main Media Citra Insan Author: DR. Abdurrahman Al Baghdady ISBN: 978-979-17530-1-5 Pages: 123 Content: 1. Hilal circulation of the sun and the occurrence time 2. Preliminary Determination of the Moon with astronomical Hisab Early 3.Perbedaan Ramadan " IED" 4. Holidays differences " Idul Adha in Indonesia What happened?