Why Is Rahu Kaal Different in Delhi and Mumbai?
Rahu Kaal is not a fixed slot on the clock. It is one-eighth of the day, measured from your own city's sunrise to sunset — which is why Delhi, Mumbai and Chennai read differently on the same Monday, and why the window also moves with the season.
Two people open their phones on the same Monday morning. In Delhi the app says Rahu Kaal is 7:09 to 8:54; in Mumbai it says 7:41 to 9:20. Both are right, and neither panchang is "fake". Rahu Kaal was never a clock time to begin with — it is a fraction of daylight, and daylight is not the same thing in two cities.
Rahu Kaal is a share of the day, not a slot on the clock
Take the length of the day — from sunrise to sunset — and divide it into eight equal parts. Each weekday has one of those eight parts assigned to Rahu. That part is Rahu Kaal. That is the whole calculation.
Notice what the definition depends on: sunrise and sunset. Not on 7:30 AM, not on "one and a half hours". If the day is fourteen hours long, each of the eight parts is one hour forty-five minutes. If the day is ten hours long, each part is seventy-five minutes. The window stretches and shrinks with the daylight itself.
So when someone insists Rahu Kaal on Monday is "always 7:30 to 9:00", he is remembering one reading, from one city, on one day, and treating it as a permanent rule.
Which of the eight parts belongs to which day
The assignment is fixed and every panchang follows the same order:
- Somwar (Monday) — 2nd part
- Mangalwar (Tuesday) — 7th part
- Budhwar (Wednesday) — 5th part
- Guruwar (Thursday) — 6th part
- Shukrawar (Friday) — 4th part
- Shaniwar (Saturday) — 3rd part
- Ravivar (Sunday) — 8th part
Why these particular portions belong to these particular days, I will say honestly: the tradition hands the order down intact, and I have not come across a convincing explanation of the assignment itself in the texts I have read. Anyone offering a tidy scientific-sounding reason is inventing it.
The same Monday in Delhi, Mumbai and Chennai
Now put real cities into the formula. Take a mid-June day. The figures below are rounded and meant only as an illustration — the actual minutes change every single day.
- Delhi — sunrise around 5:24, sunset around 7:22. Day length nearly fourteen hours, so each part runs about 1 hour 45 minutes. Monday's second part falls roughly 7:09 to 8:54.
- Mumbai — sunrise around 6:02, sunset around 7:17. A shorter day, each part about 1 hour 39 minutes. Monday's second part falls roughly 7:41 to 9:20.
- Chennai — sunrise around 5:44, sunset around 6:38. Each part about 1 hour 37 minutes, and Monday's second part lands somewhere near 7:21 to 8:58.
Two things are happening at once. Mumbai sits well west of Delhi, so the sun reaches it later and the whole window slides forward by more than half an hour. Chennai sits far to the south, so its summer day is shorter and its window is not only shifted but narrower. Same date, same weekday, same rule, three different answers — because sunrise is a local fact, not a national one.
This is exactly why a panchang has to be calculated for your own place. Our daily panchang takes the city you choose and derives the window from that day's actual sunrise and sunset, rather than repeating a memorised figure.
The season moves it as much as the city does
Even if you never leave your own street, your Rahu Kaal moves through the year. A Delhi summer day of about fourteen hours gives eight parts of roughly 105 minutes each. In late December the same city has barely ten hours of daylight, so each part shrinks to around 77 minutes — and the window also begins much later, because sunrise itself has slipped by nearly two hours.
June's Rahu Kaal and December's Rahu Kaal in one house are therefore different in both start time and length. Nothing has gone wrong. The rule stayed the same; the day changed shape.
What people usually get wrong
Saving a screenshot. The commonest mistake, and the easiest to fix. People screenshot a Rahu Kaal chart once and consult it for months. Every value in that image was correct for one date in one city, and is quietly wrong from the next morning onward. By the time the season turns it can be off by an hour — meaning you avoid the wrong hour and go ahead in the real one.
Thinking the whole period is dangerous. It is not. Rahu Kaal is a muhurta consideration — a stretch traditionally avoided for beginning something new and important: signing an agreement, starting a journey, opening a shop, buying a vehicle. It says nothing about your ordinary day. Eating, working, studying, taking your medicine, going to office, tending to a patient — none of it is prohibited, and no shastra asks you to sit still for ninety minutes.
Assuming everyone weighs it equally. Practice genuinely differs. In Tamil Nadu, Karnataka and Andhra it is checked before almost any new undertaking. In much of North India, families consult it mainly for travel and formal beginnings, and many observe it lightly or not at all. Neither habit is a corruption of the other.
Letting it override an emergency. No tradition worth following asks you to delay a hospital run because of a time window. Where a duty is urgent, the duty comes first. And if a genuinely important muhurta needs to be weighed against your own chart, that is a matter for a consultation, not a rule of thumb.
The short version
Rahu Kaal is one-eighth of the daylight, assigned by weekday — so it follows your city's sunrise and sunset, and both of those differ between Delhi, Mumbai and Chennai and shift again with the season. Look it up fresh for your own place each morning instead of trusting a saved image. And hold it lightly: it is a scheduling preference for new beginnings, not a period to be afraid of.