Event-based Rectification

What it does

When the recorded birth time is wrong — by 5 minutes, an hour, or sometimes more — every dasha sequence and every house cusp drifts along with it. Rectification is the process of finding the true birth time by checking which time produces a chart whose dashas line up with the actual major events of the native's life.

Event-based rectification automates this:

You enter 3-10 known life events with dates and types
KarmaWheel sweeps candidate birth times within a window (default ±60 minutes of the recorded time, in 5-minute steps)
For each candidate, it computes the chart and dasha sequence, then scores how well the active Maha/Antar at each event date aligns with that event's natural-significator planets
Returns a ranked list of candidate times

How to find it

Features menu → ⏱ Event-based Rectification.

What you enter

Sweep parameters

Window (±N minutes from recorded birth time) — default 60
Step (sweep granularity) — default 5 minutes

A ±60 / 5-min sweep evaluates 25 candidates. A ±120 / 2-min sweep evaluates 121 — slower, but more precise once you've narrowed in.

Events

For each event, you enter:

Date (YYYY-MM-DD)
Type — pick from the dropdown: marriage, childbirth, career, foreign_travel, property, vehicle, litigation
Note (optional free-text description for your records)

You need at least one event to run. Three events produces useful results; 5-10 events tightens the ranking considerably.

How the score is computed

For every candidate birth time:

Compute the chart and dashas (level 1 + 2)
For each event: - Find the Mahadasha and Antardasha active on the event date - Resolve the activator-planet set for that event type — the same set that Specialty Timing uses (see Specialty Timing docs) - +2 if the Mahadasha lord is in the activator set - +1 if the Antardasha lord is in the activator set
Sum the score across all events

The candidate with the highest total score is the most likely true birth time.

How to read the result

The page shows:

Best candidate — highlighted gold band at the top, with its H:MM time, the Lagna sign at that time, and the score
All candidates ranked — full table with H:MM, Lagna, score

A clear winner is what you hope to see — one candidate with a much higher score than its neighbours. Ties or near-ties mean the events don't constrain the birth time enough; either add more events, or narrow the window and re-sweep with a finer step.

Tips for good rectification

Diverse event types help. Three marriages don't constrain well (the same activator set fires for all of them); marriage + career + foreign-travel pulls in different planets.
Spaced-out dates help. Events all in one year fall within the same Antardasha and don't differentiate candidates. Spread across multiple decades works better.
Strong, datable events only. "Met my partner mid-2010" is too vague; "got married 2011-03-14" is concrete.
Iterate. First sweep ±60 / 5min to find the rough window; second sweep ±10 / 1min around the winning candidate to pinpoint.

Limitations and caveats

This is a dasha-only rectification. Classical rectification also uses transits at event (especially Saturn and Jupiter), the Ascendant degree vs. the event's nature, the Moon's nakshatra-pada, and specific yogas active at events. Those are weighed less here.
The activator-sets are broad — Saturn activates "career" but also activates several other things; over-fitting can occur if you don't have diverse events.
Very narrow windows + fine steps can still produce ties when the event-set is small. No algorithm replaces the experienced rectifier.

When to use the standalone Rectification feature instead

KarmaWheel has a separate Birth Time Rectification feature (under the existing menu) that uses different classical signals — the Lagna's sign / nakshatra / nakshatra-lord, the Moon's pada, panchanga matching for the day of birth.

The two are complementary:

Birth Time Rectification (classical) — when you want a time consistent with the natal chart structure (the right Ascendant sign, etc.)
Event-based Rectification (this one) — when you have event evidence and want the time consistent with the unfolding

A robust rectification typically uses both.