In classical Vedic astrology and traditional Hindu timekeeping, Rahu Kaal (also spelled Rahukalam or Rahu Kalam) is a daily daytime period lasting approximately 90 minutes. It is governed by Rahu, the northern ascending node of the Moon. In astronomy, Rahu is not a solid planet like Mars or Venus, but a mathematically calculated intersection where the Moon's path crosses the apparent path of the Sun.
Puranic tradition recounts that during the churning of the cosmic ocean (Samudra Manthan), the Asura Swarbhanu drank the nectar of immortality. When the Sun and Moon alerted Lord Vishnu, he used the Sudarshana Chakra to divide the form into two entities: the upper head became Rahu and the torso became Ketu.
Because Rahu holds a natural tension with the Sun and Moon, his daily daytime window is associated with sudden impulses, distraction, and unexpected delays. Initiating fresh financial investments or long-term projects during this period often requires extra rework later.
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