[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Archaeology, epigraphy and coins](https://indike.org/pramana/ins.epigraphy) › [Book of Indian Eras, with Tables for Calculating Indian Dates](https://indike.org/pramana/ins.epigraphy.cunningham-1883) › c7.2 # Book of Indian Eras, with Tables for Calculating Indian Dates c7.2 Book of Indian Eras, with Tables for Calculating Indian Dates c7.2 - **Language:** English ### [c7.2](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.2) THE \*Bârhaspatya-Mâna\*, or Cycle of Jupiter, is a period of sixty years, or five revolutions of the planet, each year of which has a different name. This era was considered by Warren to be "very ancient;"\* but James Prinsep, misled by Csoma de Kőrös and Bentley, thought it was a "comparatively recent introduction."† The former understood from the Tibetan authorities that the Vrihaspati Chakra was introduced into India about the year 965 A.D., a date which tallied very closely with Bentley's assumed epoch of Varâha Mihira in A.D. 966-67. Happily, Bentley's vagaries have long ago been set to rest, while Colebrooke's date of Varâha Mihira, the author of the Sûrya Siddhânta, has been satisfactorily established. As Varâha died in A.D. 587, his writings describing the Cycles of Jupiter must be referred to the middle of the Sixth Century A.D. But as he quotes Vriddha Garga as his authority,‡ the Jovian Cycle must have been in use before the Christian era. - [Previous: c7.1](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.1) - [Next: c7.3](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.3) - [Up: c7](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7) ## Linked texts (1) - [Sūryasiddhānta](https://indike.org/pramana/in.astro.siddhanta.early.suryasiddhanta) — Maya, Sanskrit --- Source: [https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.2](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.2) · Pramāṇa