A Dharmaśāstric text which deals with significances of lunar days i.e. tithi. This book is a part of author’s encyclopaedic work, Smṛtitattva that is divided into 28 sections each of which bear the appellation Tattva. The first folio consists of the list of contents. 137th page is torn. The last page is a personal letter, not a part of this text. Extent and format of original and physical characteristics: 151 Folios; Incomplete MS. No colophon found.; Extremely fragile. The original size of the folios are 40X7 cm. Author: Raghunandana Bhaṭṭācārya. The place of composition of this manuscript is Bengal.