In Hindu Vigyan, Rahu Kaal is one of the 8 segments of the day and is considered an unfavorable period in Indian astrology because of its association with the evil Rahu. The segments are calculated by taking the total time between sunrise and sunset, at a given location, and then dividing this time by 8. Astronomically in the Hindu Panchang Panchangas, the ever-changing planetary patterns mean that the propitious hours during every day It does not always fall at the same time. Rahu kaal (Raahukaala), Gulikakaala, Yamagandakaala (Yama Ghantam) and Vishaghati are the periods considered particularly unfavorable or unfortunate (Ashubh).
According to Indian astronomers, the planets are the Sun, the Moon, Mars, Mercury, Venus, Jupiter, Saturn, Rahu and Ketu. Although Rahu and Ketu are not physical bodies, they are sensitive points called lunar nodes at the intersection of the ecliptic (the apparent path of movement of the Sun) and the orbit of the Moon. Rahu is the north node and Ketu is the south node. Ancient astronomers felt that the powerful Rahu and Ketu had the strength to darken the sun, causing a solar eclipse. Therefore, it is considered unfavorable to set up a business during this “Rahukaal”. Each day, this Rahukaal lasts about 90 minutes, but the duration varies according to the duration between sunrise and sunset.
To calculate Rahukaal, the time between sunrise and sunset is divided into 8 units or time groups, whose time group will have the Rahukaal depending on the day of the week. Several websites offer calculations for a specific place and time.
For each weekday, Rahukaal falls as below:
Raahu Kalam / Rahu Kalam Timings:
Sunday 4:30 PM to 6:00 PM
Monday 7:30 AM to 9:00 AM
Tuesday 3:00 PM to 4:30 PM
Wednesday 12:00 PM to 1:30 PM
Thursday 1:30 PM to 3:00 PM
Friday 10:30 AM to 12:00 PM
Saturday 9:00 AM to 10:30 AM