Most Vedic apps show the same Rahu Kaal for all of India — calculated from a generic IST formula. But Rahu Kaal is 1/8th of the actual daytime from today's sunrise at your location. Ujjain (75.79°E) was the prime meridian of ancient Indian astronomy (Surya Siddhanta). Modern IST uses 82.5°E instead. Ujjain sunrise is 28 min later than IST meridian. CosmosPandit uses precision astronomy (Jean Meeus, Astronomical Algorithms) to calculate the exact sunrise at Ujjain's coordinates (23.176500°N, 75.788500°E), giving you the correct Rahu Kaal every day.
Ujjain is one of the seven sacred cities (Sapta Puri) of Hinduism, home to the Mahakaleshwar Jyotirlinga — one of the 12 most sacred Shiva shrines in India. Ujjain holds a unique place in Vedic astronomy: it was the prime meridian of the Surya Siddhanta and ancient Indian calendrical science — the original zero longitude of Hindu astronomy. The Simhastha Kumbh Mela held here every 12 years draws 75 million pilgrims. Every ritual at Mahakaleshwar is timed to Ujjain's actual sunrise.
India uses a single timezone (IST, UTC+5:30) across 30° of longitude. But sunrise follows the sun, not the clock — every 1° of longitude – 4 minutes difference. Kolkata’s sunrise is 80 minutes earlier than Mumbai’s on the same IST day, so Rahu Kaal falls at genuinely different times in each city.
This Rahu Kaal page is just the start. The CosmosPandit app gives every Indian the full Vedic astrology toolkit — in their own language, with timings precise for their city:
Ancient Indian astronomers selected Ujjain (75.77°E) as the zero longitude because it lies on a convenient meridian that also passes through Lanka (Sri Lanka) and Mount Meru in ancient geographical models. The Surya Siddhanta, written over 1500 years ago, defines Ujjain as the prime meridian. When IST was established in 1905, the British chose 82.5°E instead.
The Mahakaleshwar temple's daily Bhasma Aarti begins at 4 AM and the subsequent aartis are at sunrise-relative times. The temple pandits use the traditional Ujjain Panchang (calibrated to 75.77°E) for exact timing. CosmosPandit's calculation from Ujjain's coordinates matches this traditional timing.
Yes. CosmosPandit is fully available in Hindi — all timings, Rashifal, and Panchang in Hindi. Ideal for Mahakaleshwar devotees and Simhastha Kumbh pilgrims.
Astronomically precise Rahu Kaal timings for 25 major Indian cities.