Rahu Kaal or Rahu Kalam according to Indian Vedic Astrology is the certain parts of the day considered to be inauspicious periods during which one should not undertake any auspicious work - especially any new undertaking.

Rahu Kaal differs from place to place depending on Sunrise & Sunset time. The day duration from Sunrise to Sunset, at a particular location, is divided into eight equal parts. There is no Rahu Kaal during the first period of any weekday. On Monday it falls on the 2nd period, Saturday 3rd period, Friday 4th period, Wednesday 5th period, Thursday 6th period, Tuesday 7th period & Sunday 8th period. 

The following are the details of the Rahu Kaal periods in operation during the various weekdays. This is based on 6:00 am local Sunrise time and 6:00 pm local Sunset time. If the Sunrise and Sunset times are different, you can take the day duration, divide it in to 8 equal parts and apply the above given formula.

Since the Raahu Kaala is dependent on the Sunrise and Sunset times of your particular location, you must calculate it for each day using the bellow method.

Your local Sunrise and Sunset times are usually given in the local newspapers.