'English Date - Tithi Conversion Tables 'सम्वत तिथि सुबोधनी '

There was a continuous need to prepare a English date to Tithi conversion tables, So a series of book titled 'English date conversion Tables' or 'सम्वत तिथि सुबोधन' published which contains English date conversion Tables to tithis for more than 5000 i.e. starting from the birth year of Shri Krishna to current ages, Most of the Asia history is written in the solar-lunar dates (tithi) and there was a deep desire to have an unambiguous calendar start from 3230 BCE (128 Before Kaliyuga) to 2030 CE (5132 Kali Year) to fill it all the historic events in order.

Key points and Practical Tips for reading books

1. Disclaimer

Content contained or made available through this book is not intended to and does not constitute legal advice. The publisher and the author are providing this book and its contents on an “as is” basis. Your use of the information in this book is at your own discrion and responsibility, method of calculation, and difference of opinion is possible For all or part of the information represented in this book. Although every precaution has been taken to avoid error, howvere mistakes may have crept in, due to printing, typing, mathemetical formaulation, rounding off the long decimal numbers and due to any other reasons etc, we welcome all suggestions for improvement in the future and all suggestion will be gladly and thankfully received and will be coorected in future editions, howvere we are not responsible for any mistakes printed in this book.

2. Use of The Proleptic Gregorian Calendars

Since before October 15, 1582, the Gregorian Calendar had not been invented however We can still identify particular days prior to October 15, 1582 using Gregorian Calendar simply by projecting the Gregorian dating system back beyond the time of its implementation. A calendar obtained by extension earlier in time than its invention or implementation is called the "proleptic" version of the calendar, For example October 15, 1582 (Gregorian) date was October 5, 1581 (in Julian Calander) Similarly, dates after October 15, 1582 (Gregorian) have equivalent, but different, dates in the Julian Calendar. For example, 1992-10-10 in the Gregorian Calendar is 1992-09-27 in the Julian Calendar. In this book we have used Proleptic Gregorian Calendars to avoid confusions,

3. Calculation Based on Sun Rise

The start of the date and all the movement of astronomical bodies and the calculation of time is based on approximated sun rise time, the transition of astronomical bodies, movement from one zodiac sign to another, change of values of various units for example Tithi, can occur at any time during the day, but for practical purposes, it is convenient to consider the start of the day at sunrise. Please check few previous and next days to get a clear approximate view.

4. Calculation Based on Ujjain As Location

Ujjain is located at latitude 23.18239 and longitude 75.77643. It is located in northern hemisphere, Part of southeast Asia Continent, Indian State of Madhya Pradesh Ujjain holds a significant place in ancient Asian astronomy and being considered as prime meridian (zero longitude) or Greenwich of ancient time", it is located on first meridian in Indian geography, with ancient astronomical observatories and scholars like Varahamihira contributing to its prominence. Ujjain was a hub for astronomical and mathematical studies and have an ancient observatory known as The Vedic Clock observatory, which houses instruments for measuring time, celestial altitudes, planetary motions, and eclipses where scholars like Varahamihira, Bhaskara I, Brahmagupta, and Bhaskara II studied the skies and made elaborate calculations, and the commentory on ancient important works on astronomy, such as the Surya Siddhanta and Panch Siddhanta, were written in Ujjain.

5. Calculation Based on NC Lahri Ayanamsha (अयन अंश)

The nakshatra, House and astronomical degrees are mentioned using NC Lahri Ayanamsha, as mentioned earlier, for those prefer other Ayanamsha, adjustment are required to be made purposes,

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