[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Reference works](https://indike.org/pramana/ins.reference) › [Vedic Index of Names and Subjects](https://indike.org/pramana/ins.reference.macdonell-keith-1912) › v1.c3.s20.42 # Vedic Index of Names and Subjects v1.c3.s20.42 Vedic Index of Names and Subjects v1.c3.s20.42 - **Language:** English ### [v1.c3.s20.42](https://indike.org/pramana/ins.reference.macdonell-keith-1912.v1.c3.s20.42) The meaning of the number is easily explained when it is remembered that a periodic month occupies something between 27 and 28 days, more nearly the former number. Such a month is in fact recognized in the Lāṭyāyana³⁰ and Nidāna Sūtras³¹ as consisting of 27 days, 12 months making a year of 324 days, a Nakṣatra year, or with an intercalary month, a year of 351 days. The Nidāna Sūtra³² makes an attempt to introduce the Nakṣatra reckoning into the civil or solar (sāvana) year of 360 days, for it holds that the sun spends 13⅓ days in each Nakṣatra (13⅓ × 27 = 360). But the month of 27 or 28 days plays no part in the chronological calculations of the Veda.³³ - [Previous: v1.c3.s20.41](https://indike.org/pramana/ins.reference.macdonell-keith-1912.v1.c3.s20.41) - [Next: v1.c3.s20.43](https://indike.org/pramana/ins.reference.macdonell-keith-1912.v1.c3.s20.43) - [Up: v1.c3.s20](https://indike.org/pramana/ins.reference.macdonell-keith-1912.v1.c3.s20) ## Linked texts (2) - [Lāṭyāyanaśrautasūtra](https://indike.org/pramana/in.vedanga.kalpa.srauta.latyayana) — Lāṭyāyana, Sanskrit - [Nidānasūtra](https://indike.org/pramana/in.vedanga.chanda.nidana) — Patañjali (grammarian), Sanskrit --- Source: [https://indike.org/pramana/ins.reference.macdonell-keith-1912.v1.c3.s20.42](https://indike.org/pramana/ins.reference.macdonell-keith-1912.v1.c3.s20.42) · Pramāṇa