Sade Sati is the period when Saturn transits the twelfth, first and second signs counted from the Moon sign in your birth chart. "Sade sati" simply means seven and a half — Saturn takes about two and a half years per sign, and three signs make roughly seven and a half years.
The calculation
It needs two things: your natal Moon sign, and where Saturn is now. Both are computable to the minute. There is no judgement involved in determining whether you are in it — either Saturn is in one of those three signs or it is not.
The three phases have names. The rising phase is Saturn in the twelfth from your Moon, the peak is Saturn over your Moon itself, and the setting phase is the second. Because Saturn goes retrograde for about four and a half months a year, it can leave a sign and re-enter it, which is why the phase dates are sometimes not three clean blocks.
Everyone gets it, and gets it more than once
This is the part that is usually left out. Saturn takes about 29.5 years to go round the zodiac, so Sade Sati arrives roughly every 29 to 30 years. Most people who live a normal lifespan go through it two or three times.
At any moment, one quarter of all living people are in some phase of it. It is not a rare affliction. It is a scheduled transit that everyone shares with about two billion others.
What the texts actually say
Classical sources associate Saturn with delay, effort, responsibility and the slow consolidation of things. Applied to a transit over the Moon — which signifies the mind and emotional temperament — the traditional reading is a period that asks for patience and tends to feel heavier than it looks from outside.
The texts do not say you will lose your job, your health or your family. That framing is a commercial addition, and it is the one that sells remedies.
Our position
We calculate the dates and phases and show them. We do not sell remedies, poojas, yantras or gemstones for Sade Sati, and we do not think anyone should.
If a site or a person tells you that a payment will remove a planetary transit, consider what is actually being claimed: that a specific sum of money will alter the orbit of Saturn. Nobody believes that literally, which means something else is being sold.
How to read your own dates
Our calculator scans forward from the present and reports every entry and exit, handling retrograde re-entry properly. Use it to see where the boundaries fall, and read the period as the texts frame it — a stretch that rewards patience — rather than as something to survive.