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A daśā system answers the question that a static birth chart cannot: when? The natal chart shows what a life contains; the daśā tells you which part of that chart is active at any given moment. Vimśottarī — meaning “of 120” — is the most widely used daśā in Vedic astrology, and it is the system Jyoti Guide applies by default. This guide explains the panel and how to read it.

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How Vimśottarī works

Vimśottarī divides a notional 120-year lifespan among the nine planets, each ruling a continuous block of years called a mahādaśā (major period). The sequence and lengths are fixed. Where in the cycle you begin depends on the nakṣatra your Moon occupied at birth: that nakṣatra’s lord rules your first mahādaśā, and the fraction of the nakṣatra the Moon had already crossed determines how much of that first period was already spent at the moment of birth — the balance of daśā.
Because Vimśottarī is keyed entirely to the Moon’s nakṣatra position, it is sensitive to birth time. A significant birth-time error can shift period boundaries by weeks or months. Always use the most accurate birth time available.

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The nine periods

The nine planets cycle in this fixed order, covering exactly 120 years in total:
PlanetYears
Ketu7
Venus20
Sun6
Moon10
Mars7
Rāhu18
Jupiter16
Saturn19
Mercury17
Total120
Only the starting planet varies from person to person. Once you know which planet you begin with, the rest of the sequence follows inevitably.

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Nesting: mahādaśā → antardaśā → pratyantardaśā

Each mahādaśā is subdivided into nine antardaśās (sub-periods) in the same planetary order and in proportion to the same period lengths. Each antardaśā is further divided into nine pratyantardaśās. The panel reports all three levels, which together pin a time window down to a span of weeks: 
Current Daśā: Mercury Mahādaśā → Rāhu Antardaśā → Sun Pratyantardaśā
Reading those three lords together — the houses they rule, the houses they occupy, and their mutual relationship — is the core of daśā interpretation.

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Reading the panel

The panel is organised into three named blocks followed by the full timeline.

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Block 1: Birth Daśā

This block shows the conditions at birth — which nakṣatra the Moon occupied and how much of the opening mahādaśā remained: 
Nakshatra:         Jyeshtha (#18)
Dasha lord at birth: Mercury
Mahadasha balance: 5y 4m 14d
Here the Moon sits in Jyeṣṭhā, a Mercury nakṣatra. Life therefore opens in a Mercury mahādaśā, with 5 years, 4 months, and 14 days of it still to run at birth (the remainder having elapsed before birth as the Moon crossed through the nakṣatra).

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Block 2: Active at target

This block shows the three nested periods running on the chosen date, with exact start and end dates: 
Mahadasha:        Mercury  (2015-01-12 → 2031-10-15)
Antardasha:       Rahu     (2024-05-21 → 2026-11-25)
Pratyantardasha:  Sun      (2026-06-02 → 2026-07-18)
By default the target date is today, so this block tells you the period you are living through right now.

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Block 3: Mahādaśā Timeline

The full sequence of major periods with their start dates, end dates, and durations: 
Lord      From         To           Years
Mercury   2015-01-12   2031-10-15    17
Ketu      2031-10-15   2038-09-08     7
Venus     2038-09-08   2058-05-26    20
Sun       2058-05-26   2064-04-24     6
Moon      2064-04-24   2074-03-03    10
Mars      2074-03-03   2081-01-25     7
Rahu      2081-01-25   2098-10-23    18
Jupiter   2098-10-23   2114-08-01    16
Saturn    2114-08-01   2133-04-23    19

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How to use the panel

1

Locate yourself

The Active at target block names the three lords shaping the present moment. Look at where each of those planets sits in the natal chart and what houses they rule — their themes are the themes of the period.
2

Set a target date to look forward or back

Change the Target date field to any date in the past or future. The Active at target block updates instantly, letting you identify which period was running at a past event or preview the chapter that lies ahead.
3

Combine with Gochara

A daśā names which planet is “on stage”; Gochara shows where that planet is transiting right now. The two together are far stronger than either alone — a daśā lord that is also transiting a sensitive angle delivers results far more reliably than one simply running its period in isolation. See Timing an event for a full worked example.