Rahukalam, Yamagandam and Gulika: Inauspicious Times to Avoid

Three classical inauspicious time bands run every day in Vedic muhurta: Rahukalam (Rahu's window), Yamagandam (Yama's window) and Gulika (Saturn's son's window). Each lasts roughly 90 minutes and shifts to a different clock position per weekday. Abhijit, the universally auspicious midday window, is the positive counterpoint. This piece covers all four, with per-weekday timing.

The three inauspicious bands

South Indian Vedic muhurta tradition identifies three daily inauspicious time bands that operate as a strict filter on top of any other muhurta layer. Each band is roughly 90 minutes long, computed as one-eighth of the day arc (sunrise to sunset). All three bands shift to a different clock position every weekday, following fixed sequence rules. The three bands take their names from the malefic influences they carry: Rahukalam carries Rahu, the north lunar node. Yamagandam carries Yama, the Vedic god of death. Gulika carries the son of Saturn, who in the classical mythology shares Saturn's restrictive nature. The Wikipedia entry on the panchangam introduces the broader Vedic time framework within which these bands sit.

The conventional sequence for using these bands runs as follows. First, clear the day at the panchang level (tithi, nakshatra, yoga, karana, vara). Second, identify the three inauspicious bands for that weekday at the city of action. Third, remove those bands from the available hours of the day. Fourth, choose the best remaining window using the Choghadiya or hora layer. This four-step sequence is how traditional households approach important daily decisions. For milestone events the inauspicious bands are non-negotiable; for routine decisions they are still consulted but the rule is treated as a strong preference rather than an absolute.

The three bands do not overlap on most weekdays, which means each weekday carries three separate inauspicious windows occupying roughly 4.5 hours of the daylight period. On some weekdays the bands cluster closer together; on others they spread across morning, midday and afternoon. This spread is part of why the windows are non-obvious without looking up the day-specific timing. A meeting scheduled at 10am Monday lands inside Rahukalam, while the same 10am on Wednesday lands outside all three bands.

Rahukalam

Rahukalam is the most widely observed of the three bands. The word combines Rahu (the north lunar node, one of the two shadow planets in Vedic astronomy) and kalam (time or window). The convention is that Rahu rules one specific eighth of the day arc each weekday and that the actions performed during that segment carry Rahu's dispositional signature: confusion, unexpected complication, hidden friction or delayed outcome. The Wikipedia entry on Rahu documents the planetary mythology and the broader astrological reading.

The weekday-to-segment mapping is conventional and fixed. Counting the eight day segments from sunrise (1 through 8), the Rahukalam segment per weekday is: Sunday 8 (the last segment before sunset), Monday 2, Tuesday 7, Wednesday 5, Thursday 6, Friday 4, Saturday 3. The mnemonic sequence (starting from Sunday) is 8, 2, 7, 5, 6, 4, 3. For practical clock timings, assuming sunrise around 06:00 and sunset around 18:00 (which gives 90-minute day segments): Sunday Rahukalam runs roughly 16:30 to 18:00, Monday 07:30 to 09:00, Tuesday 15:00 to 16:30, Wednesday 12:00 to 13:30, Thursday 13:30 to 15:00, Friday 10:30 to 12:00, Saturday 09:00 to 10:30. The strict timings shift with actual sunrise and sunset for the city and date.

What Rahukalam is conventionally read to disrupt: new ventures, contract signing, registration paperwork, journey beginnings, major purchases, important conversations and any moment that anchors a new beginning. The dispositional signature is not that the action will fail catastrophically; the reading is that the action will encounter friction, delay, hidden complication or the kind of confusion that requires later correction. A loan agreement signed in Rahukalam often produces unexpected terms surfaced later. A journey begun in Rahukalam often encounters delay or rerouting. A first conversation begun in Rahukalam often produces a misalignment that needs to be revisited.

Yamagandam

Yamagandam carries the influence of Yama, the Vedic god of death, dharma and the southern direction. The word combines Yama and gandam (knot or restrictive bond). The convention is that one specific eighth of the day arc each weekday carries Yama's restrictive influence and that actions performed during that segment carry friction with completion, closure or commitment. Yamagandam is observed alongside Rahukalam in South Indian Vedic practice; some North Indian traditions emphasise Rahukalam and treat Yamagandam as secondary, but the South Indian almanacs publish both equally.

The weekday-to-segment mapping for Yamagandam (counting from sunrise) is: Sunday 4, Monday 5, Tuesday 3, Wednesday 1, Thursday 2, Friday 7, Saturday 6. The mnemonic sequence from Sunday is 4, 5, 3, 1, 2, 7, 6. For practical clock timings with the same 06:00 sunrise and 18:00 sunset assumption: Sunday Yamagandam runs roughly 10:30 to 12:00, Monday 12:00 to 13:30, Tuesday 09:00 to 10:30, Wednesday 06:00 to 07:30, Thursday 07:30 to 09:00, Friday 15:00 to 16:30, Saturday 13:30 to 15:00.

What Yamagandam disrupts: actions involving closure, commitment, finalisation or completion. The dispositional signature is the inverse of Rahukalam's confusion signature; Yamagandam carries a stuck or premature-ending quality. A contract finalised in Yamagandam often gets renegotiated or terminated early. A relationship commitment expressed in Yamagandam often encounters internal hesitation later. The conventional avoidance overlaps with Rahukalam's avoidance list (no new starts, no contracts, no journey beginnings) but the underlying mechanism differs. Most modern practitioners treat the two bands as functionally equivalent for daily-life decisions.

Gulika (Mandi)

Gulika is the third inauspicious band and is associated with Mandi, who in classical Vedic mythology is the son of Saturn. The dispositional signature carries Saturn's restrictive character: slowdown, lengthening of timelines, structural impediment. Gulika is also known as Maandi in some traditions and as the upagraha (sub-planet) Gulika in classical horary work. Tempora's Saturn return reference covers the broader Saturn signature; Gulika inherits a daily-time version of that quality.

The weekday-to-segment mapping for Gulika is the reverse-numerical sequence: Sunday 7, Monday 6, Tuesday 5, Wednesday 4, Thursday 3, Friday 2, Saturday 1. The mnemonic sequence from Sunday is 7, 6, 5, 4, 3, 2, 1; it counts down by one each weekday. For practical clock timings: Sunday Gulika runs roughly 15:00 to 16:30, Monday 13:30 to 15:00, Tuesday 12:00 to 13:30, Wednesday 10:30 to 12:00, Thursday 09:00 to 10:30, Friday 07:30 to 09:00, Saturday 06:00 to 07:30.

What Gulika disrupts: actions requiring smooth flow, quick momentum or unobstructed delivery. Gulika is conventionally treated as slightly less severe than Rahukalam and Yamagandam by some traditions, in which Gulika is observed only for the most important muhurta selections (marriage, business launch, major purchase) and not for routine daily decisions. Other traditions treat all three bands as equally weighted. The conservative practice is to observe all three for any milestone event and to observe Rahukalam strictly for daily decisions while treating Yamagandam and Gulika as preferences.

Abhijit: the auspicious counterpoint

Abhijit is the universally auspicious 48-minute window centred on solar noon. The name comes from the lost twenty-eighth nakshatra Abhijit (only twenty-seven nakshatras are conventionally used in modern Vedic practice, but the classical literature names a twenty-eighth that sits between Uttara Ashadha and Shravana). The window inherits the strongly auspicious character of that nakshatra and runs from roughly 24 minutes before solar noon to 24 minutes after, regardless of weekday or other panchang factors. The Wikipedia overview on the Abhijit nakshatra documents its classical position and modern absence.

Solar noon shifts with longitude and across the year. For Indian cities at standard longitude (around 75 to 82 degrees east), solar noon typically lands between 12:00 and 12:30 IST. For Mumbai, solar noon is typically around 12:35 IST. For Chennai, around 12:10 IST. For Delhi, around 12:25 IST. The Abhijit window for each city is centred on its own solar noon and lasts the full 48 minutes. Daily panchang publications return the exact Abhijit timing per city.

The exception holds: in some traditions Abhijit is considered weaker on Wednesdays because Wednesday is ruled by Mercury and the classical interaction between the Abhijit window and the Mercury weekday produces a less auspicious signature. Most modern South Indian practice observes Abhijit on all seven days; the Wednesday weakening rule is a North Indian convention that is observed by some lineages. For practical use, Abhijit is the fallback auspicious window when other muhurta layers conflict and a quick decision is needed. It overrides Rahukalam, Yamagandam and Gulika in the sense that it is read as auspicious even if it overlaps with one of them; the rare overlap is most likely on Wednesday when Yamagandam (segment 1) does not overlap and Rahukalam (segment 5) overlaps with Abhijit near solar noon. In that case the conservative practice avoids the overlap; the liberal practice treats Abhijit as still operative.

Per-weekday timing table

The following table assumes a representative day where sunrise is around 06:00 and sunset around 18:00 (90-minute day segments). Actual times shift with date and location.

For accurate per-city timing, consult a daily panchang for the city of action. Most Indian panchang applications return the four windows directly. Tempora's working approach uses Swiss Ephemeris with True Pushya Paksha ayanamsa to compute the bands from real sunrise and sunset; conventional panchang printouts carry an error margin of a few minutes from the simplified sunrise-sunset model.

What to avoid during the three bands

Conventional South Indian Vedic teaching avoids six categories of action during Rahukalam, Yamagandam and Gulika.

Signing contracts and legal paperwork. Registration documents, lease agreements, partnership deeds, employment contracts, legal settlements. The conventional teaching is that documents signed during the inauspicious bands often produce later renegotiation, unexpected clauses surfaced after signing or termination earlier than expected. This is the strictest avoidance category; even routine paperwork is conventionally deferred.

Starting new ventures. Business launches, registration of new entities, opening a shop in the morning, beginning a new course of study, starting a new diet or exercise regimen with intent to last, planting a tree, breaking ground on construction. The avoidance is dispositional: the venture inherits the friction signature of the band it begins in.

Beginning a journey. Long-distance travel, journeys with uncertain outcome, journeys for the purpose of meeting an important person, vehicle deliveries, package dispatch where the journey is the point. Routine commutes that are continuations of existing patterns are conventionally exempt; what is avoided is the beginning of a non-routine journey.

Making important decisions. Financial decisions (investment commitments, major purchases, accepting or declining job offers), relational decisions (commitments, separations), career decisions. The conventional teaching is that decisions made during these bands carry confusion (Rahukalam), premature closure (Yamagandam) or structural impediment (Gulika); the decision quality suffers.

Beginning medical treatment. Scheduled surgeries, beginning a new medication course, starting a treatment programme. Acute medical care continues regardless of muhurta; what is conventionally deferred is the planned start of a new treatment.

Important conversations. Conversations with authority figures, negotiations, first meetings, conversations seeking commitment or resolution. The conventional teaching is that the conversation either misfires, produces a temporary alignment that later breaks or carries a friction quality that lingers.

What is acceptable during the bands

Conventional teaching explicitly permits continuation of existing work during the inauspicious bands. The principle is that the band influences the moment of starting a new thing; continuation of an existing pattern is acceptable. Specifically: continuing in-progress work (coding, writing, manufacturing), attending standing meetings that are part of an established cadence, eating regular meals, sleeping, exercising as part of an established routine, casual conversation with family and friends, household maintenance work, paying utility bills and other recurring obligations, learning that continues an established course of study.

Routine commuting is generally acceptable when it is a continuation of an existing pattern; what is avoided is using the inauspicious band as the starting moment of a journey to a new destination. Routine medical care that continues an existing programme is also acceptable; the deferred category is the start of new medical work. The distinction across all six avoidance categories is the same: the band influences the start; continuation of existing flow is exempt.

Worked example: a Wednesday in Bangalore

Consider a working professional planning a Wednesday in Bangalore. Sunrise in Bangalore on a representative date in early June lands around 05:55 IST and sunset around 18:45 IST, giving a day arc of about 12 hours 50 minutes and a day segment length of about 96 minutes.

For Wednesday, the inauspicious bands per the conventional mapping are: Rahukalam in segment 5, Yamagandam in segment 1, Gulika in segment 4. Counting from sunrise at 05:55, the clock boundaries land approximately at: Yamagandam (segment 1) 05:55 to 07:31, Gulika (segment 4) 10:43 to 12:19, Rahukalam (segment 5) 12:19 to 13:55. Solar noon for Bangalore lands around 12:30 IST, which means Abhijit runs roughly 12:06 to 12:54.

The day reads as follows. Avoid scheduling new starts in the opening Yamagandam window (05:55 to 07:31); this is an early-morning routine window. Between 07:31 and 10:43 the day is clear of all three inauspicious bands; this is the best block of the morning for important meetings, contract signing, new starts and journey beginnings. The Gulika window (10:43 to 12:19) is avoided for milestone actions. The Abhijit window (12:06 to 12:54) is interesting because it overlaps Gulika at its start and Rahukalam at its end. In the conservative reading, Abhijit on a Wednesday is weakened and the overlap pushes the auspicious window into a contested space; the practical decision is to use either the morning clear block (07:31 to 10:43) or the afternoon clear block. The afternoon clear block runs from 13:55 (end of Rahukalam) to 18:45 (sunset), giving roughly five hours of unblocked daylight for the second half of the day. The single most important action of the day should land between 07:31 and 10:43 or after 13:55.

For the same professional in Chennai, the segments would shift because solar noon is earlier (around 12:10 IST). For Mumbai, the segments shift later (solar noon around 12:35 IST). The structural pattern (Wednesday inauspicious bands in segments 1, 4 and 5) is universal; the clock projection depends on local sunrise and sunset.

Computing the bands for your own day

To use Rahukalam, Yamagandam and Gulika for any working day, follow a simple sequence.

• Step one: identify the weekday and look up sunrise and sunset. The bands are computed from the day arc, which runs sunrise to sunset. A Vedic panchang for your city returns both to the minute. The Vedic day starts at sunrise, so a band before sunrise still belongs to the previous weekday's night calculation (which uses a different but parallel rule set).
• Step two: compute segment length. Day arc length divided by eight gives day segment length. On the equinox each segment is 90 minutes; on other dates it shifts. For higher latitudes the variation is larger.
• Step three: apply the weekday-to-segment mapping. Rahukalam (1=Sunday) lands in segments 8, 2, 7, 5, 6, 4, 3. Yamagandam in segments 4, 5, 3, 1, 2, 7, 6. Gulika in segments 7, 6, 5, 4, 3, 2, 1. From sunrise, count forward to identify the clock boundaries for each band.
• Step four: identify Abhijit. Solar noon is the midpoint of the day arc (sunrise plus half of day length). Abhijit runs from 24 minutes before solar noon to 24 minutes after. On Wednesdays in conservative practice it is treated as weaker.
• Step five: schedule the action. Avoid the three inauspicious bands for new starts and important actions. Prefer Abhijit for actions that need maximum auspicious support. Use the clear blocks between bands as the working windows.

Most Indian panchang applications publish all four windows directly per city. For a deliberate scheduling decision, the published values from a city-specific panchang are faster and more reliable than manual computation. The manual method is useful for understanding the structure; the published bands are what conventional practice consults.

What the inauspicious bands do not predict

The Rahukalam, Yamagandam and Gulika reading is precise for daily-time avoidance but explicitly limited on three fronts. First, the bands do not predict outcomes; they describe dispositional friction at the moment of starting a new thing. A contract signed inside Rahukalam can still produce a positive outcome if the underlying deal is sound; the band signals only that the signing moment carries a friction signature, which may show up as later renegotiation or unexpected complication.

Second, the bands do not override the larger panchang reading for milestone events. A wedding date chosen by avoiding Rahukalam alone, without checking tithi, nakshatra, yoga and karana, carries weaker structural support than a wedding chosen at the panchang level. The bands are a daily filter; the panchang is the structural foundation.

Third, the bands do not apply to acute or emergency action. A medical emergency that occurs during Rahukalam is treated immediately; the band does not pause the response. A safety-critical journey begun out of necessity during the band is read as exempt from the avoidance rule because the action is forced rather than chosen. The bands govern deliberate scheduling, not forced response.

Conclusion

Rahukalam, Yamagandam and Gulika are the three classical inauspicious time bands of South Indian Vedic muhurta. Each runs for roughly 90 minutes per day and shifts to a different clock position every weekday following fixed mapping rules: Rahukalam at segments 8, 2, 7, 5, 6, 4, 3 (Sunday through Saturday), Yamagandam at 4, 5, 3, 1, 2, 7, 6, Gulika at 7, 6, 5, 4, 3, 2, 1. Abhijit, the 48-minute window centred on solar noon, is the universally auspicious counterpoint that is weaker only on Wednesdays in some traditions. The conventional working sequence is to clear the day at the panchang level for milestone events, identify the three inauspicious bands, identify Abhijit and schedule deliberate action into the clear blocks. The bands are dispositional, not deterministic; they describe friction signatures at the starting moment of new things, while continuation of existing work is exempt. The reading is one filter among many in the larger muhurta system; for routine daily decisions it is the strongest filter and for milestone events it operates inside the broader panchang reading.

Frequently asked questions

Read next

• Choghadiya: the eight intraday segments that refine the clear blocks
• Hora calculation: the planetary hour as the precision layer
• Business launch muhurta: the two-layer muhurta plus D10 reading
• Pushya nakshatra: the universal commerce nakshatra at the panchang level
• Swiss Ephemeris: the engine behind precise sunrise and band computation
• Techniques cluster: all chart and timing techniques

This article was first published on 2026-06-05. It documents conventional South Indian Vedic teaching on Rahukalam, Yamagandam and Gulika daily inauspicious bands plus the Abhijit auspicious counterpoint. Internal audit log maintained for methodology revisions; any subsequent material change to the framework above will be appended here with a dated note. This article represents conventional Vedic teaching and Tempora Research method documentation. It does not constitute medical, financial, legal or professional advice.