A composition of six existing calculations
The finder does not invent a new planetary point. It composes six calculations that can also be opened separately on this site. First, apparent-Sun rise and set calculations define daylight at the entered coordinates. The chosen civil weekday assigns Rahu Kalam, Yamaganda, and Gulika to three daylight eighths. The same daylight span is split into fifteen parts to locate the middle Abhijit interval. A separate eight-part division supplies the daytime Choghadiya name. Apparent geocentric Sun and Moon longitudes, converted with this site’s approximate Lahiri ayanamsa, supply tithi, nakshatra, yoga, and karana.
This separation matters. Sunrise and sunset are modeled astronomical events. The division names and event preferences are traditional selection rules applied to those events. A numerical score describes this page’s declared rule set; it does not measure a physical force or a probability of success.
How exact boundaries become continuous windows
For each local date, the engine starts with the later of sunrise and the visitor’s earliest clock time, then stops at the earlier of sunset and the chosen finish time. It collects every boundary inside that span: Choghadiya changes, the start and end of Rahu Kalam, Yamaganda, Gulika and Abhijit, and every tithi, nakshatra, yoga, or karana change. Sorting those instants divides daylight into atomic segments on which all labels are stable.
Each atomic segment is tested against the selected exclusions. Adjacent segments that survive are joined into one continuous candidate even when a favorable factor changes inside it. Its displayed score is the duration-weighted average of the component scores. The expandable table preserves those components. A minimum-duration rule is applied only after the continuous window is assembled, so an Abhijit boundary cannot accidentally turn one usable ninety-minute opening into several discarded fragments.
Hard exclusions are switches
| Switch | What it removes | Calculation behind it |
|---|---|---|
| Rahu Kalam | The assigned weekday daylight eighth. | The popular Yamardha one-eighth table. |
| Yamaganda | Its separately assigned weekday eighth. | Local sunrise-to-sunset divided by eight. |
| Gulika Kalam | Its separately assigned weekday eighth. | Local sunrise-to-sunset divided by eight. |
| Avoided Choghadiya | Rog, Kaal, and Udveg segments. | The published weekday day sequence. |
| Vishti karana | Any atomic segment with Vishti. | Moon–Sun elongation divided into six-degree half-tithis. |
| Profile cautions | Chaturthi, Navami, Chaturdashi, or Amavasya when listed by the event profile, plus Atiganda, Shula, Ganda, Vyaghata, Vajra, Vyatipata, Parigha, and Vaidhriti yoga. | An explicit editorial screening list, shown here so it can be accepted or turned off. |
The separate Rahu Kalam method and Choghadiya weekday tables document two of the component conventions. These sources also make clear that a local date and place matter and that related regional methods exist.
The score after exclusions
| Factor | Points | Meaning inside this tool |
|---|---|---|
| Choghadiya | Amrit +4; Shubh +3; Labh +2; Char +1; Rog, Kaal, Udveg −3 | The base weight. A profile-preferred name adds one more point. |
| Vara | +1 | Monday, Wednesday, Thursday, or Friday in the current profiles. |
| Tithi | +2 preferred; −2 cautioned | The preference list changes by event profile. |
| Nakshatra | +3 preferred | The largest profile-specific positive weight. |
| Yoga | +1 favorable; −2 caution | A secondary screening factor, never hidden. |
| Karana | +1 for Bava, Balava, Kaulava, Taitila, Gara, or Vanij; −3 for Vishti | A half-tithi factor. |
| Abhijit | +2; Wednesday overlap −1 | The middle fifteenth of daylight, with the stated Wednesday caution used by the separate calculator. |
Scores of ten or more are labeled Strong, seven through 9.9 Good, four through 6.9 Usable, and lower surviving scores Limited. These labels compare intervals produced by this rule set. They do not compare the spiritual validity of ceremonies or forecast real-world results.
What changes between event profiles
The hard solar-day periods do not change when the event menu changes. The menu changes the preferred Choghadiya names, tithis, and nakshatras. All six profiles use the same one-point weekday preference for Monday, Wednesday, Thursday, or Friday; that shared weight does not distinguish one event from another. Travel, business, wedding, and other profiles still rank differently because their Choghadiya, tithi, and nakshatra lists differ, and every choice remains inspectable.
| Profile | Preferred Choghadiya | Preferred tithis | Preferred nakshatras |
|---|---|---|---|
| General ceremony or important start | Amrit, Shubh | Dvitiya, Tritiya, Panchami, Saptami, Dasami, Ekadasi, Trayodasi | Asvini, Rohini, Mrigasiras, Punarvasu, Pushya, Hasta, Chitra, Svati, Anuradha, Sravana, Dhanishta, Revati |
| Wedding or commitment ceremony | Amrit, Shubh | Dvitiya, Tritiya, Panchami, Saptami, Dasami, Trayodasi | Rohini, Mrigasiras, Magha, Uttara Phalguni, Hasta, Svati, Anuradha, Mula, Uttara Ashadha, Uttara Bhadrapada, Revati |
| Business opening or agreement | Labh, Amrit, Shubh | Dvitiya, Tritiya, Panchami, Dasami, Ekadasi, Trayodasi | Asvini, Rohini, Mrigasiras, Punarvasu, Pushya, Hasta, Chitra, Svati, Anuradha, Sravana, Dhanishta, Revati |
| Study, teaching, or examination start | Amrit, Shubh, Labh | Dvitiya, Tritiya, Panchami, Saptami, Dasami, Ekadasi | Asvini, Rohini, Mrigasiras, Punarvasu, Pushya, Hasta, Chitra, Svati, Anuradha, Sravana, Satabhisaj, Revati |
| Travel or departure | Char, Amrit, Shubh | Dvitiya, Tritiya, Panchami, Saptami, Dasami, Trayodasi | Asvini, Mrigasiras, Punarvasu, Pushya, Hasta, Svati, Anuradha, Sravana, Dhanishta, Revati |
| Home, property, or move-in | Amrit, Shubh, Labh | Dvitiya, Tritiya, Panchami, Saptami, Dasami, Ekadasi, Trayodasi | Rohini, Mrigasiras, Uttara Phalguni, Hasta, Anuradha, Uttara Ashadha, Sravana, Uttara Bhadrapada, Revati |
A worked wedding-window example
Suppose one surviving interval runs from 10:00 to 11:30. From 10:00 to 10:45 it is Shubh Choghadiya (+3), a wedding-profile match (+1), on a preferred weekday (+1), with Panchami (+2), Rohini (+3), Siddha yoga (+1), and Bava karana (+1): segment score 12. At 10:45 the nakshatra changes to one outside the preferred list, so the second forty-five minutes score 9. Nothing prohibited begins, so the two segments remain one ninety-minute candidate. The duration-weighted score is (45 × 12 + 45 × 9) ÷ 90 = 10.5. If Rahu Kalam began at 11:00 and its switch were on, the candidate would end at 11:00 and the remaining half-hour would appear in the removed-interval table.
What a full Muhurta judgment can add
A practitioner may require an electional Lagna, house placements, Moon strength, Tara Bala or Chandra Bala from a person’s birth nakshatra and Moon sign, combustion or retrogression rules, regional festival calendars, or a text-specific rule for the event. Marriage, travel, house entry, and commercial openings do not necessarily share one authoritative list. The finder therefore presents candidates and evidence rather than declaring an ordained “best minute.”
The fixed UTC offset is another material limit. Coordinates do not identify historical civil-time law, and a daylight-saving change cannot be represented by one offset if it occurs inside the search. Horizon elevation, refraction, ephemeris choice, and ayanamsa can also move a boundary. The solar calculations use Astronomy Engine 2.1.19; the sidereal conversion is the site’s stated Lahiri approximation. Near a boundary, compare like-for-like conventions.
Questions people ask
Why can a high-scoring period be absent?
A hard exclusion has priority over points. The removed-interval table names the overlap. Turn off only the rule you intend to reconsider and rerun the same dates.
Why does the candidate contain several rows?
The window stays continuously free of selected exclusions, but one scoring factor changes inside it. The rows preserve that change and the weighted calculation.
Does the tool use birth data?
No. It uses date, location, fixed UTC offset, event profile, and filter choices. It does not derive a visitor’s chart or send those inputs to Star & Sigil.
Component references: Rahu Kalam daylight-eighth method; Choghadiya day table; Abhijit Muhurta location table; Astronomy Engine rise/set and ephemeris documentation.