Dasha Sandhi gear-shift changeover time between dasha periods

"Sandhi" = "rule for changing something". In language grammar, sandhi is a rule for changing a sound, such as the English plural rule for when plural-s sounds like 's' and when it sounds like 'z'. In calligraphy, 'sandhi' is a ligature that bridges two characters.

In Jyotisha, dasha-sandhi is the rule for calculating how long the "change-over effect" will take, when the native shifts from one mahadasha to another mahadasha.

Experientially, dasha-sandhi can be thought of as "time required for changing planes" in an airport, or as the the "gear-shift" period in automotive gear transmission.

Neither the passing mahadasha nor the arriving mahadasha performs at maximum power during dasha-sandhi.

Also, it is helpful for predicting events to calculate the dasha-sandhi period between some of the longer bhukti periods during the longer mahadasha such as periods of Shukra, Budha, and Shani.

To calculate the length of dasha-sandhi[approximately]

Rule

Example

1. take the combined length of the previous dasha and the next dasha

2. calculate 10 percent of total

3. divide the 10 percent roughly in half

4. consider the dasha sandhi or "gear change to start 9 months before the end of previous mahadasha, and to end 9 months after the beginning of next mahadasha

e.g., if you are changing from Surya Mahadasha to Chandra Mahadasha , take 6 years for Surya and 10 years for Chandra = two combined periods = 16 years

e.g., 10% of 16 years = 1.6 years (approx. 18 months)

e.g., 9 months

e.g., Surya Mahadasha will start losing momentum soon after the start of Surya/Shukra, and Chandra Mahadasha will give full effects only after the first 9 months of Chandra/Chandra.

Sandhi Period	Mahadasha passing away		Mahadasha approaching	Days-months of the sandhi "gear-shift" period =
from Ketu to Shukra	10% of Ketu's 7-year mahadasha = the final 256 days of Ketu mahadasha	+	10% of Shukra 20-year mahadasha = initial two years of Shukra	approx 2 years 9 months
from Shukra to Surya	10% of Shukra 20-year mahadasha = final two years of Shukra mahadasha	+	10% of Surya 6-year mahadasha = initial 220 days of Surya	approx 2 years 7 months
from Surya to Chandra	10% of Surya 6-year mahadasha = final 220 days of Surya mahadasha	+	10% of Chandra 10-year mahadasha = initial one year of Chandra mahadasha	approx 1 year 7 months
from Chandra to Mangala	10% of Chandra 10-year mahadasha = final one year of Chandra mahadasha	+	10% of Mangala 7-year mahadasha = initial 256 days of Mangala mahadasha	approx 1 year 9 months
from Mangala to Rahu	10% of Mangala 7-year mahadasha = final 256 days of Mangala mahadasha	+	10% of Rahu 18-year mahadasha = initial 1 year 10 months of Rahu mahadasha	approx 2 years 6 months
from Rahu to Guru	10% of Rahu 18-year mahadasha = final 1 year 10 months of Rahu mahadasha	+	10% of Guru 16-year mahadasha = initial 1 year 6 months of Guru mahadasha	approx 3 years 4 months
from Guru to Shani	10% of Guru 16-year mahadasha = final 1 year 6 months of Guru mahadasha	+	10% of Shani 19-year mahadasha = initial 1 year 9 months of Shani mahadasha	approx 3 years 3 months
from Shani to Budha	10% of Shani 19-year mahadasha = final 1 year 9 months of Shani mahadasha	+	10% of Budha 17-year mahadasha = initial 1 year 7 months of Budha mahadasha	approx 3 years 4 months
from Budha to Ketu	10% of Budha 17-year mahadasha = final 1 year 7 months of Budha mahadasha	+	the initial 255 days of Ketu mahadasha	approx 2 years 4 months

Dasha-sandhi occurs because the physical body is slowerto accommodate the psychic programming changes which have already taken place on the astral plane and above.

Our hopes, wishes, desires, expectations, beliefs, anxieties, fears, and faith are woven into psychic patterns. If not apprehended and managed directly in their psycho-mental form, the psychological projections forthcoming from these expectations and desires will begin to percolate down into the emotional and material planes, causing sensually tangible changes.

The social and emotional perceptions are more flexible and therefore one might notice the appearance of a new person, a change of social relationship, or a new set of emotional responses during the dasha-sandhi period. However it may be quite awhile before the physical body is prepared to fully accommodate the new goals, new karma, and new wisdom indicated by the change in spiritual agenda.

Naturally, as a person ages, there is increasing physical body resistance to changing environmental conditions.

Unless one is psychically vigilant to maintaining high creativity, trust, and permission levels, the body's survival instincts can squash even the most brilliant mahadasha prospects during dasha sandhi.

To be compassionate toward the physical body and its natural survival programming, appreciate that at time of dasha sandhi, the body has been long accustomed to managing the psychic inflow of the old mahadasha.

It will take most of the allotted "dasha sandhi" time for the "new you" to really bear fruit.

Nevertheless, there are usually a few confirming events right at the beginning of a new mahadasha that prove a noticeable shift in your aura. Since energy percolates down from the aura's higher pictures into the time-space world, you will notice some significant improvements in mental and emotional health first - before any material changes. Often the psychic excitement of gaining more information from your memories at the onset of a new mahadasha generates a burst of enthusiasm for life (at least for a positive mahadasha).

Right at the beginning of the new mahadasha, even though dasha sandhi may prevent dramatic events, you start to get fresh insights regarding your psychic interrelationships with important people in your life. At least one significant new relationship should start within the first "double" bhukti - and often there are several new "key" people introduced at this time.

You may not be able to use the information right away, but you will be given it very near to the beginning of the new mahadasha.

Remember, anything which is naturally controlled by physical body systems is especiallyslow to change. E.g., appearance, skin, weight, food, sexuality, etc.

It is most desirable of course to do most of your change work on the spiritual and mental planes themselves, where fast-paced creative inspiration gives shockingly fast results, and the body's survival/change-resistance patterns don't get in the way.

Folks who do most of their karmic work on these higher planes (i.e. via meditation and creative visualization) are not much encumbered by the sloth of the material plane, and dasha-sandhi barely affects them.