This book investigates the complex astronomical calculations required to accurately determine the Islamic calendar, prayer times, and the direction of the Qibla. Mohammad Ilyas, drawing on his expertise in Islamic astronomy and mathematics, presents a comprehensive guide that bridges historical Islamic methods with modern computational techniques. The work details the celestial mechanics, mathematical formulas, and observational data necessary for these calculations, providing a framework for understanding and verifying these crucial aspects of Islamic practice.

This work is recognized as a significant contribution to the field of Islamic astronomy and applied mathematics. It is valued for its rigorous approach to calculations that are fundamental to Islamic religious observance. The book is likely to appeal to scholars, students, and practitioners interested in the scientific underpinnings of Islamic traditions, offering a detailed and authoritative resource.