A birth chart is a map of what is possible. It does not, by itself, say when. Vedic timing uses two clocks at once. The Vimshottari dasha is the long clock, counted from the Moon's nakshatra at birth, and it decides whose "season" you are living in. Gochar (transit) is the short clock: where the planets are in the sky this month, counted especially from your natal Moon. Either clock alone is a half-sentence. Together they are how a competent Jyotishi times a job, a marriage, a move or a hard year.
What dasha actually is
Vimshottari divides a 120-year span among the nine grahas. You are always in a Mahadasha (the major period of one planet) and an Antardasha (a sub-period of another). The planet whose dasha is running gets to tell its story - the houses it rules for your Lagna, the house it sits in, and the yogas it joins. A Jupiter Mahadasha does not "bring luck" in the abstract. It brings whatever Jupiter actually owns and occupies in your own chart. That is why two people in Jupiter dasha can have opposite decades.
The full sequence, including the smaller layers, is explained in the Vimshottari Dasha guide. Your own dates are on the Janma Mahadasha calculator. Read those dates before you read a transit forecast. If Saturn is transiting your 10th but you are in a Venus–Moon period that has nothing to do with career, the job change may wait.
What transit actually is
Gochar asks: where is Saturn, Jupiter, Rahu, Ketu, Mars and the Sun right now, counted from the natal Moon (and, for some techniques, from the Lagna). Slow planets set the weather for years. Fast ones colour a month. Sade Sati is simply Saturn moving across the three signs around your Moon. It is a transit, not a dasha, which is why it can fall in a supportive Mahadasha or a harsh one and feel completely different.
The current planetary transit page shows the sky against a natal chart. The year calculator blends those transits with the dasha running in each month, which is closer to how a reading is actually done than a transit list by itself. The Varshaphala and Muntha guide is a third clock: the solar-return year chart, which can make a year feel unlike the Mahadasha without overriding it.
When the two clocks disagree
They often do. A classic pattern: the dasha of a 10th lord is running (career is "on"), but Saturn is transiting the 8th from the Moon (effort feels heavy). The honest reading is not "you will not get the job" and not "Saturn will ruin the dasha". It is: the opportunity is in the period, the workload is in the transit, so the year asks for stamina rather than a miracle. The opposite also happens - a weak dasha with a beautiful Jupiter transit can give a short, real opening that does not last unless the dasha can hold it.
As a working rule used in practice: dasha shows which topic is allowed to speak; transit shows the weather in which it speaks. An event that both support is the one people remember. An event that only the transit supports is often a rumour, a near-miss, or someone else's news.
Scrub an age. One clock is the dasha period; the other is Saturn from the Moon.
Janma Rashi (Moon sign)
The period (dasha)
Surya–Surya
The period names the topic.
The weather (Saturn from Moon)
Saturn from the Moon
The transit names the weather.
Dasha names the topic; transit names the weather.
A teaching toy: the first Mahadasha runs its full years from age 0, and Saturn moves one sign every 2½ years. Dated results for a real birth live on the Janma Mahadasha calculator and the transit page.
What this is not
It is not a calendar of guaranteed dates. Dasha boundaries are sensitive to birth time because they start from the Moon's nakshatra pada. A twenty-minute error can slide an Antardasha by months. Transits are more forgiving, which is why Moon-based Sade Sati still works when the Lagna is uncertain - and why house-based claims need an exact time.
It is also not medical, legal or financial advice. A hard Saturn–8th combination can coincide with a health investigation; the investigation still belongs to a doctor. Use the clocks to decide when to push and when to prepare. Use professionals for the content of the push.
