This book is intended for astrologers and general spiritual readers. For non-astrologers: Birth Time Determination takes the readers on a spiritual journey through the process of birth. It tries to explain some of the perplexing questions around the reason and purpose of birth. The analogies and reasoning presented have been backed by research papers from medical fraternity. This book lays its foundation upon the ancient knowledge provided in our Vedas, Upanishads and Geeta, to unravel the journey of the aatman across birth and death. It explains the connection between the aatman and the physical body via interaction of tatvas (five elements) and prana vaayu. For astrologers: A long standing question staring at astrologers is how to decide the correct criteria for birth time. This book provides a definitive answer to this question in a most authoritative manner with sound reason and logic. Birth time determination lies at the crossroads of astrological principles, medical science research and spirituality. Unless one takes a holistic approach, it is not possible to come out with sound conclusion about the correct birth time. Shri A. B. Shukla is a retired IAS officer and is presently working as a Member of National Monuments Authority of India. He is the Honorary President of Indian Council of Astrological Sciences (ICAS). Shri Shukla has decoded and explained the genesis of many fundamental astrological principles from Bhagwad Geeta, Vedas, Upanishads and other scriptures. The Kanchi Shankaracharya (H.H. Swami Jayendra Saraswati) honoured him with ‘Jyotish Ratna’. Shri Kuldeep Jiwani is a B.Tech from IIT-Delhi and is currently working as a Data Scientist in an MNC. He is also the Assistant Controller of Examinations for ICAS. He has been learning the divine knowledge of Jyotisha under the guidance of his Guru, Shri A. B. Shukla for nearly a decade. He has been awarded with the title of Jyotish Kovid by ICAS.