What Is Rahu Kaal? Meaning, Timings, and How to Calculate

If you have ever postponed a wedding errand, a shop opening, or a long journey by an hour or two, you may have been working around Rahu Kaal. It is one of the most widely observed timing rules in Nepali and Hindu daily life.

Rahu Kaal (राहु काल) is a fixed inauspicious window of roughly 90 minutes that occurs once every day. Most people avoid starting anything important during it. The exact clock time shifts daily, because it is tied to sunrise and sunset, not to a fixed hour.

This guide explains what Rahu Kaal means, how it is derived by dividing the day into eight parts, the weekday order of its slots, and why the precise time depends on your location and the season.

What does Rahu Kaal actually mean?

Rahu Kaal is the daytime period ruled by Rahu, the shadow planet (a lunar node) in Vedic astrology. It lasts about one-eighth of the daylight span, so roughly 90 minutes when day and night are near equal. Tradition treats it as unfavorable for beginning auspicious or important tasks.

Rahu is not a physical planet. In classical Hindu astronomy it is the north lunar node, the point where the Moon's path crosses the ecliptic. Because Rahu is associated with sudden disruption, confusion, and obstacles, the slot of the day it governs is considered a poor moment to begin something that you want to go smoothly.

A key point people miss: Rahu Kaal mainly affects the start of an activity. Work already in progress is generally allowed to continue. So a task begun before Rahu Kaal can simply carry on through it.

How is Rahu Kaal calculated from sunrise to sunset?

Rahu Kaal is calculated by taking the full daylight duration, from sunrise to sunset, and dividing it into eight equal parts. Each part is one slot. Rahu Kaal occupies exactly one of those eight slots, and which slot depends on the day of the week.

Here is the method step by step:

1. Find the local sunrise and sunset times for your place and date.

2. Subtract sunrise from sunset to get the total daylight length.

3. Divide that length by eight. Each piece is one slot of equal duration.

4. Pick the slot that belongs to today's weekday (see the table below).

An example makes it clear. Suppose the Sun rises at 6:00 AM and sets at 6:00 PM, giving 12 hours of daylight. Divided by eight, each slot is 90 minutes. The first slot is 6:00 to 7:30, the second is 7:30 to 9:00, and so on. The first slot is never Rahu Kaal. This same divide-by-eight logic underlies several daily timings you will see in a daily Panchang reading.

Why the duration is rarely exactly 90 minutes

Ninety minutes is only the figure when daylight is exactly 12 hours, which happens near the equinoxes. In summer the days are longer, so each slot, including Rahu Kaal, stretches past 90 minutes. In winter the days are shorter, so each slot shrinks. The slot is always one-eighth of that day's daylight, never a fixed clock block.

What is the weekday order of Rahu Kaal slots?

The Rahu Kaal slot follows a fixed sequence tied to the seven weekdays, and it is never the first slot of the day. Sunday takes the eighth slot, Monday the second, and the rest follow a traditional order. The table below shows the slot number and the approximate time for a standard 6:00 AM to 6:00 PM day.

A common memory aid runs Mother Saw Father Wearing The Turban Suit, mapping to Monday, Saturday, Friday, Wednesday, Thursday, Tuesday, Sunday in increasing slot order. But you do not need to memorize this. The times above are only approximate, and they shift with real sunrise and sunset.

Why do exact Rahu Kaal times vary by location and season?

Exact Rahu Kaal times vary because sunrise and sunset themselves vary by your latitude, longitude, and the time of year. Kathmandu, Pokhara, Biratnagar, and a Nepali household in Sydney all see the Sun rise at different clock times, so each gets a different Rahu Kaal window even on the same weekday.

Two factors drive the difference:

• Location: Places east of you see an earlier sunrise. Latitude also changes how long the day is. Both shift the eight slots.

• Season: Daylight is longest near the summer solstice and shortest near the winter solstice, so the slot length grows and shrinks through the year.

This is exactly why a printed once-and-done table can mislead you. The reliable approach is to use a tool that computes sunrise and sunset for your precise place and date, then derives the slot. The Nepali Calendar app does this automatically, showing the correct Rahu Kaal for wherever you are. If you also track wedding planning, the same location-aware logic feeds into picking an auspicious wedding date and Saait.

Rahu Kaal and the rest of the Panchang

Rahu Kaal is one of several daily timing markers. Alongside it sit Gulika Kaal and Yamaganda, plus the five core limbs of the calendar: tithi, vara, nakshatra, yoga, and karana. To see how these fit together, read about the five elements of the Panchang. The Moon's daily star, for instance, ties into the 27 nakshatras and their meanings.

Explore more on Nepali Calendar (Katigate)

• Today's Panchang

• Auspicious Saait & muhurat dates

• Daily Rashifal

Frequently Asked Questions

Can I do important work during Rahu Kaal?

Rahu Kaal mainly discourages starting a new important task, such as signing a deal, beginning a journey, or opening a venture. Work already underway is generally fine to continue. Many people also note that daily routine tasks and worship of certain deities are unaffected by Rahu Kaal.

Is there a Rahu Kaal at night?

The classic Rahu Kaal is a daytime period only, derived from dividing sunrise-to-sunset daylight into eight parts. Some traditions also calculate a night-time version by splitting sunset-to-next-sunrise into eight slots, but the daytime Rahu Kaal is what most Nepali calendars and Panchang listings show.

Why is Rahu Kaal never in the first slot of the day?

By tradition the period just after sunrise is treated as pure and favorable, so the first of the eight slots is never assigned to Rahu. The Rahu slot ranges from the second to the eighth depending on the weekday, which is why mornings on most days stay relatively clear.

How accurate are printed Rahu Kaal tables?

A printed table using a fixed 6 AM to 6 PM day is only a rough guide. Real sunrise and sunset differ by city and season, sometimes by 30 minutes or more, which shifts every slot. For an accurate window, use a location-aware Panchang tool that computes the actual daylight span for your date and place.