A birth chart describes your tendencies, but it is static. Vimshottari dasha is the system that turns it into a timeline — telling you which planet is “running the show” during a given period of life.
The 120-year cycle
Vimshottari assigns each of nine planets a fixed number of years, totalling 120: Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17. Life moves through these mahadashas in sequence.
Where your dasha starts
The starting point is set by the nakshatra your Moon occupies at birth. Each nakshatra is ruled by a planet, and that ruler — plus how far the Moon has travelled through it — determines your first dasha lord and the balance remaining at birth.
Layers within layers
- Mahadasha: the major period (years).
- Antardasha: sub-periods within each mahadasha (months to a couple of years).
- Pratyantardasha: sub-sub-periods (weeks to months) for finer timing.
Reading a period
A dasha activates the themes of its lord — its house rulership, placement, strength, and the planets it associates with. A strong, well-placed planet tends to deliver its significations during its period; an afflicted one tends to bring its challenges. The mahadasha sets the backdrop; the antardasha colours the specific months.
Why forward-scanning matters
Because the timeline is deterministic, you can scan forward through upcoming sub-periods and score each for a given theme — marriage, career, wealth — to surface the strongest windows ahead. This is exactly how Sivayan produces dated timing windows with honest confidence tiers instead of vague “soon”.