Dasa period dates

[Guest guest]

Hello Mani and folks,

 

Mani asked a question which I think I'll answer to the list as well.

 

No matter how one tries to fit in events, the 4th level gets out of gear

often, the third when the period is sun, kethu etc.,( the short

periods). I do not how GJ calculates the periods and dates at present,

but the usual manual method rounds off, taking 30 days as 1 month and

leap years are not specifically considered, which may explain this. Is

it possible to calculate the respective periods in days only and add

them on to the julian day of birth as julian days and then derive the

actual date for each period? Or does GJ do just that?

 

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Reply by Raghu Goravani

 

Heaven Hi! (opposite of hell-low)

 

GJ does probably the best or most exact thing possible given the dasha

science from the classics. That is, it takes the lengths of the

maha-dashas, and derives a high precision decimal percentage that each

one represents in the 120 year scheme. Then, using that, it figures the

length in seconds of clock time that each sub period should be within

each greater period. The resultant sub periods, all levels, are exact

therefore. I round off to the day they change in for showing on lists

and printouts, but internally, the math is exact to the second just to

make sure.

 

I definitely do not take 30 days as a month or any other such thing,

even when using 360. It's done as pure math. There is a starting number,

the 120 years, then there's a starting point, and that's where your moon

is, and the 365/360 switch determines the master number of seconds we

slice away from. Then it's a matter of being really exact with the

lengths, which I'm doing to the utmost precision. The switch from 365 to

360 doesn't change this- that just changes the total number of seconds

you start with, and slice away at with the exact percentages.

 

The 30 day months that books often show is not exact and that's done for

ease for manual calculation. Computers are so much more capable of high

precision math so I put that to use. I don't replicate the rounding of

the manual systems at all.

 

The language I use has a nice feature in this regard, in that it's

completely Gregorian date system aware, including leap years, and so on.

So I can give it a starting date and time, to the second, and add to

that some huge number of seconds, and it will give me the exact

Gregorian date and time that "adds up to" in the future. So I don't need

to do all that date math myself- it's already in "the tool box" of stuff

the language handles.

 

I'm really quite happy about how I've handled the dashas in other words.

 

Thanks for asking, that's a good point to clarify.

 

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