The short answer: four ordinary things, and none of them is mystical. The birth time was approximate, a different ayanamsa was used, awindow was reported to you as an event, or the period was real and nothing was done inside it. In that order of frequency.

This is worth going through carefully, because the usual explanations offered afterwards — your karma intervened, the remedy was not performed correctly, the planets shifted — are unfalsifiable, and they are how a failed prediction becomes a second sale.

  1. Approximate birth timeMost commonPeriod boundaries move by days for every minute of error, and the ascendant can change sign entirely inside a quarter-hour. A chart built on “around 3pm” is a chart built on a range — and almost nobody says so out loud.
  2. A different ayanamsaVery commonSchools differ on the correction between the tropical and sidereal zodiac by enough to move a planet into the next house. Most tools never state which they used, so two practitioners can read two different charts from the same birth data.
  3. A window reported as an eventCommon“This period favours partnership” becomes “you will marry in 2024” somewhere between the chart and the conversation — usually because the second sentence is the one the client wanted.
  4. The window was real; nothing happened in itUnderratedFavourable periods do not execute themselves. A window is a tendency with dates attached, not a delivery promise.
Why confident predictions fail, ordered by how often each one turns out to be the cause.

The part that is genuinely computable

It is worth separating the arithmetic from the interpretation, because they fail for different reasons. Planetary positions and period boundaries are astronomy. Given an exact birth time and a stated ayanamsa, two competent practitioners will produce identical numbers, and those numbers can be checked against independent software.

Everything after that — what a placement means, which of several true readings matters most, what a period will feel like — is interpretation, and interpretation is where practitioners legitimately differ. A prediction that fails has usually failed at one of the two stages, and knowing which one tells you whether to distrust the chart or the reading.

The question to ask afterwards

If a dated prediction has passed, ask the person who gave it three things:

  1. Which ayanamsa did you use? If they cannot say, the chart itself was never checkable.
  2. What birth time did you calculate from, and how sensitive is this to it? A good answer includes how much the conclusion moves across the plausible range.
  3. Was that a window or an event? Asked directly, most practitioners will tell you it was a window.

You are not trying to catch anybody out. You are trying to find out whether the reading was wrong or whether it was right and was reported badly, and those need different responses.

The answer that should end the relationship: “the prediction did not manifest because the remedy was not done properly.” That reasoning cannot be wrong under any circumstances, which is precisely what makes it worthless — and it always costs more money.

What honest timing looks like

A reading that can survive this scrutiny states the ayanamsa, gives period boundaries as dates rather than years, says where birth-time uncertainty widens the answer, and describes windows in terms of what they favour rather than what they guarantee. It will feel less satisfying than a confident year, and it will still be true in five years.

Our files are built that way, which is also why they will never name your wedding date — the reasoning is here, andthis covers how much your birth time actually matters. What each file contains is on the order page.