What Is Rahu Kaal? How the Daily 90 Minute Window Is Calculated and What to Avoid
2026-09-28 · 8 min read
Rahu Kaal is a window of roughly 90 minutes in each day that Vedic astrology treats as unfavourable for starting anything new. It is one of the eight equal parts into which the time from local sunrise to sunset is divided, and the part that carries it changes with the weekday. Ongoing work is unaffected.
That last sentence is the one most often missed, and it is the reason so many people live in unnecessary fear of a 90 minute block on a calendar app. Rahu Kaal is a caution about beginnings. It is not a daily sentence.
What is Rahu Kaal in Vedic astrology?
Rahu is one of the two lunar nodes, the shadow grahas that have no physical body but are given full weight in Jyotish. In the tradition Rahu signifies obscurity, sudden appetite, confusion, and paths taken outside convention (see Rahu and Ketu in your Kundli for how the nodes work in a birth chart). Rahu Kaal is simply the slice of daylight placed under Rahu's charge.
The logic follows from Rahu's nature. A beginning wants clarity, a clean intention and a visible path. Rahu's hour offers the opposite, so the tradition says: choose another hour for the first step.
Two points of context are worth knowing. First, the practice is observed most strictly in South India, where it is called Rahu Kalam, while much of North India leans more on the Choghadiya. Second, the classical sources describe the window as unsuited to auspicious beginnings; they do not say that an act performed in it fails. That distinction matters, and we will come back to it.
How is Rahu Kaal calculated?
There are three steps, and none of them involve a fixed clock time.
- Find your local sunrise and sunset for that date and that city. Rahu Kaal is anchored to the actual sky above you, not to a standard working day.
- Divide the daylight into eight equal parts. When daylight runs about 12 hours, each part is about 90 minutes. In an Indian summer the parts stretch past 95 minutes; in December they shrink below 85.
- Take the part assigned to that weekday. Each weekday owns one of the eight parts, and the assignment never changes (the eight part division and the weekday order).
A worked example makes it concrete. In Delhi and Gurugram on Sunday 27 September 2026, sunrise falls at about 6:16 in the morning and sunset at about 6:08 in the evening. That is 11 hours and 52 minutes of daylight, so each of the eight parts runs 89 minutes. Sunday takes the eighth part, which puts Rahu Kaal from about 4:39 in the evening to sunset at 6:08 (city by city timings).
Two useful consequences fall out of the method. A generic chart of weekly timings is only an approximation unless its sunrise and sunset match your own place and date, so Mumbai and Kolkata will differ by a good half hour. And the first part after sunrise is never Rahu Kaal on any day, which is one traditional reason early morning is favoured for beginnings.
What is the Rahu Kaal time for each day of the week?
The table below uses a model day of exactly 6:00 in the morning to 6:00 in the evening, which makes each part a neat 90 minutes. Treat the clock times as a sense of where in the day the window sits, and read your own Panchang for the real figures.
| Weekday | Part of the day | Window on a 6 am to 6 pm day |
|---|---|---|
| Monday | 2nd | 7:30 am to 9:00 am |
| Tuesday | 7th | 3:00 pm to 4:30 pm |
| Wednesday | 5th | 12:00 noon to 1:30 pm |
| Thursday | 6th | 1:30 pm to 3:00 pm |
| Friday | 4th | 10:30 am to 12:00 noon |
| Saturday | 3rd | 9:00 am to 10:30 am |
| Sunday | 8th | 4:30 pm to 6:00 pm |
Read by part number rather than by weekday, the sequence is easy to hold: the second part belongs to Monday, then Saturday, Friday, Wednesday, Thursday, Tuesday, and the last part of the day to Sunday.
What should be avoided during Rahu Kaal?
The list is shorter than the internet suggests, because every item on it is a first step.
- Inaugurating a business, a shop or a new venture
- Signing or registering a significant document, including a lease or a sale deed
- An engagement, a marriage ritual, or any ceremonial beginning
- A griha pravesh, or moving into a new home
- A large or symbolic purchase: gold, a vehicle, property
- Setting out on a new journey, especially a first journey to an unfamiliar place
- A puja, hawan or yagya performed specifically to launch something or secure a worldly result
What is not on the list is everything you were already doing. Traditional practice is explicit that Rahu Kaal applies to undertaking new work, and that work already begun may continue through it.
What can you do during Rahu Kaal?
Most of life, in honesty.
- Continue anything already underway. A meeting that started at 2:30 does not need to stop because the window opens at 3:00.
- Ordinary routine, work, study, cooking, exercise and travel you do every day.
- Devotional practice. Japa, path, daily prayer and reading are not restricted. Remedial worship connected with Rahu himself is traditionally placed inside this window rather than outside it, which tells you the period is not considered spiritually barren.
- Commitments whose time you did not choose. An exam, a court date, a flight, a hospital appointment or an interview slot fixed by an employer is not you selecting a moment. Accepting a time someone else set is not the same act as choosing a muhurat.
Does Rahu Kaal really matter?
It matters as one factor among several, and it is worth using well rather than either dismissing or dreading.
Used well, Rahu Kaal is a free and sensible default. When you have no reason to prefer one hour over another and the act genuinely is a beginning, moving it out of the window costs you nothing. For a great many everyday decisions, avoiding Rahu Kaal and choosing a favourable Choghadiya or Abhijit Muhurat is all the timing you need.
Used badly, it becomes superstition. Rahu Kaal is not a prediction of failure, nothing in the tradition claims an unavoidable act performed in it is doomed, and an important step taken in the window with a clear head and honest effort is far better than one postponed into anxiety. Astrology here is guidance about quality of timing, not a guarantee about outcome. If the hour cannot be moved, say a short prayer, begin, and let it be.
What are Yamaganda and Gulika Kaal?
Rahu Kaal has two companions drawn from the same eight part division of daylight, and a Panchang usually lists all three together. Yamaganda is watched for journeys and for anything involving risk, while Gulika Kaal (also called Kuligai or Mandi) is avoided particularly for acts you do not want repeated, such as a funeral rite or an inauspicious formality.
| Weekday | Rahu Kaal | Yamaganda | Gulika Kaal |
|---|---|---|---|
| Monday | 2nd part | 4th part | 6th part |
| Tuesday | 7th part | 3rd part | 5th part |
| Wednesday | 5th part | 2nd part | 4th part |
| Thursday | 6th part | 1st part | 3rd part |
| Friday | 4th part | 7th part | 2nd part |
| Saturday | 3rd part | 6th part | 1st part |
| Sunday | 8th part | 5th part | 7th part |
In everyday practice most people track only Rahu Kaal. A pandit fixing a wedding or a griha pravesh will remove all three.
How does Rahu Kaal fit into a proper muhurat?
It is one step of five, and not the first. Choosing a genuine muhurat means screening days on the five limbs of the Panchang, checking those days against your own birth nakshatra and Moon through Tara Bala and Chandra Bala, cutting out Rahu Kaal, Yamaganda, Gulika and Bhadra from whatever survives, and only then fixing the exact minutes so the rising sign supports the work.
That is why a printed weekly Rahu Kaal chart cannot time a wedding. It can only tell you which 90 minutes not to use.
For a wedding date, a housewarming or the opening of a business, work from your own chart rather than a generic table. You can see how each reading is structured on the services page.
The practical rule
Check your local Panchang, not a fixed clock time. Keep first steps out of the window when you have the freedom to. Let ongoing work carry on. And when something genuinely cannot be moved, begin anyway, because in the Vedic view a chart and a clock describe the ground you are standing on, not a verdict already passed.
Frequently asked questions
- What is Rahu Kaal in simple words?
- Rahu Kaal is a window of about 90 minutes in every day that Vedic astrology treats as unsuited to starting something new. It is found by dividing the time between local sunrise and sunset into eight equal parts and taking the part assigned to that weekday. Because it depends on your local sunrise and sunset, it shifts from city to city and from day to day.
- Can we do puja during Rahu Kaal?
- Devotional practice is generally allowed. The traditional caution concerns a puja, hawan or yagya performed to begin something or to secure a specific worldly result, which is better placed outside the window. Daily prayer, japa, reading and path are not restricted, and remedial worship connected with Rahu itself is often deliberately done in this period.
- What should not be done during Rahu Kaal?
- Avoid first steps: an inauguration, the signing or registration of a document, an engagement or marriage ritual, a griha pravesh, a large purchase such as gold, a vehicle or property, and the start of a journey to a new place. The caution applies to beginnings only. Work already underway may continue through the window without any special concern.
- Is it bad to travel during Rahu Kaal?
- Tradition prefers that you do not set out on a fresh journey in the window, particularly the first journey to an unfamiliar place. A commute you make every day, a return leg, or a flight whose time was fixed by someone else is not treated as a new beginning. If the departure cannot be moved, the traditional response is a short prayer before leaving, not cancellation.
- Which day has the strongest Rahu Kaal?
- Many traditional almanacs hold that Rahu Kaal on Tuesday, Friday and Sunday carries more weight than on the other weekdays, so those windows are guarded more carefully for important beginnings. This is a matter of customary emphasis rather than a rule found uniformly across all classical sources, and the underlying calculation is the same on every day.