The is a comprehensive manual that details the importance, calculations, and ritualistic significance of Tithis for various religious and social ceremonies. It is considered a key reference work for Muhurta (electional astrology) and is closely related to texts like the Muhurta Chintamani . Ganesa Daivajna wrote several other important works, including "Brihat-Tithi Chintamani" and "Laghu-Tithi Chintamani," which are also referenced alongside this main text.
If you are looking to download or read the Tithi Chintamani or specialized 2021 calendars built upon its foundational math, several digital libraries provide free or educational access: tithi chintamani pdf 2021