[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) › c32.27 # Book of Indian Eras, with Tables for Calculating Indian Dates c32.27 Book of Indian Eras, with Tables for Calculating Indian Dates c32.27 - **Language:** English ### [c32.27](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c32.27) The years of intercalation being fixed by the rules laid down for the 19-year cycle, the name of the intercalated month has yet to be found. As there are 30 days in six of the lunar months, while the time of one lunation is only 29½ days, it would of course occasionally happen that two new moons would fall in the same month, one at the beginning, and the other at the end. But as this is not allowed, a peculiar arrangement has been adopted for avoiding it. In whatever month two new moons would naturally fall, that month is doubled; or, in other words, an intercalary month of the same name is added called Adhika Vaisâkha, Adhika Srâvana, &c. - [Previous: c32.26](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c32.26) - [Next: c32.28](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c32.28) - [Up: c32](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c32) --- Source: [https://indike.org/pramana/ins.epigraphy.cunningham-1883.c32.27](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c32.27) · Pramāṇa