Indian Calendar/subtraction

[Avinash Sathaye]

This is a Mathematics problem and not astronomical one.
For K12: the hours between 8:31AM  and 6:49 AM(the next day) are obtained by
calculating
30:49 - 8:31 = 22:18. Your answer 28:18 was probably obtained by adding 30:00
to 6:49.
Same mistake occurs for K14. The answer is 22:53 not 28:53.
Thus consecutive numbers are 22:18, 22:34, 22:53 - a steady progression!

Chris Eade wrote:

> Skip...
> It has a very peculiar feature: every time a ksaya tithi comes along, its
> ending time is 6gh (of 30gh per day) short of its neighbouring tithis; and
> every there is an adhika tithi it is 6gh in excess of its neighbours. This
> betrays itself if you look at the intervals between the successive tithis.
>         For instance, if you look at Sept 99 in "kalnirnay", you find 08.31
> for the end of tithi K11, 06.49 for K12, 29.23 for K13, and 28.16 for K14.
>        Now, 6.49 (K12) minus 08.31 (K11) is 28gh18, and 28.16 (K14) minus
> 29.23 (K13) is 28gh53.
>         But 29.23 (K13) minus 6.49 (K12)is only 22gh34, which is integer
> 6gh smaller than the intervals that flank it. Presumably there is some
> astrological reason for this.
>         If you know someone who could explain, I would be very much obliged
> to hear from them and be able to get to sleep o' nights.

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