The History, Science and Mathematics of Indian (Hindu हिंदू) and Other Calendars

History of Calendars
The History, Science and Mathematics of Indian (Hindu हिंदू) and Other Calendars
A book by Rajesh Kumar Chopra
  https://www.amazon.in/dp/B07BH2TSHN/ref=rdr_kindle_ext_tmb     Multiple calendar systems are being followed in this large country, India, with diverse cultures; and though each of them is individually accurate based on its adopted principles, the difference is not easily understood due to mingling of them over many centuries. Another highlight of the confusion is the names of the months being same in most of the Hindu calendars. A festival falling on different dates in different years is a common feature of all religions. For Hindus, the Hōlī Festival may occur on any day from March 1 to March 29; for Muslims the Īd may happen on any day of the year; whereas for Christians, the Easter Sunday may occur from March 22 to April 25 or as celebrated by some orthodox churches from April 3 to May 10. This does not happen arbitrarily, but there is Simple Science and Mathematics behind this. Before going through the chapters, one must understand that the simplicity is not the Nature’s nature. Though the Nature follows its set of rules, it does not like round numbers, as it has an affinity to fractions and variations. Take the example of the ratio between the circumference of a circle to its diameter. It is denoted by a Greek Letter Pi (π) which is an irrational number, i.e. its value cannot be expressedRead More…