Rahukaal,Rahu Kaalam

Rahukaalam the period of Rahu is a certain amount of time every day that is considered inauspicious for any new venture according to Indian astrology. Rahu Kala is one of the 8 segments of the day and considered inauspicious period in Indian astrology. Rahu Kalam or Rahu-kaal comes daily, but it has been seen that it is not observed in northern India, though it is carefully monitored in southern India. This is how the practice and convention have come to say. . The segments are calculated by taking the total time between sunrise and sunset, at a given place, and then dividing this time duration by 8. Astronomically in the Hindu Panchangas, the ever varying planetary configurations mean that the auspicious hours during each day will not always fall at the same moment of time. Rahukaalam and Yama Ghantam are the two time periods which are especially considered inauspicious or unlucky to start any new venture.
In all Muhurthas (auspicious time for particular functions), Rahu kaal is, by and large avoided for any auspicious work.Apparantly everybody wants to escape the unfortunate happenings, whether during the functions or even thereafter. Auspicious time selected goes a long way in conferring the needed happiness and prosperity.Muhurtha or the selection of auspicious moment can neutralize to a certain extent the afflictions existing at the specific time(meant for an event) or at the time of a prasna query. In other words, it is stated that if marital happiness is not depicted in the birth chart, the Muhurtha may not be in a position to confer on the native expected marital harmony, but it would definitely reduce the sources of friction to a great extent. Apart from selection of tithi (date), Vara (day), Nakshatra (constellation), Yoga and Karna, the selection of a particular moment is important. One method of selections of auspicious Muhurtha is with reference to the Hora of the day (each day is divided into 24 horas) and the other is with reference to the rising ascendent.In between the selection of auspicious time, comes the Rahu kaal, which is normally advised to be avoided.Rahu kaal is determined with reference to the time of Sunrise say around 06:00 A.M. Rahu-kaal would be ruling the following hours of the day. Hence it is considered inauspicious to begin any undertaking during this "Rahukaalam". Every day this Rahukaalam lasts for around 90 minutes, but the duration differs according to the length of the time between sunrises and sunset.
Although the time Rahukaalam falls on each day, and its span varies and needs to be calculated as per the sunrise and sunset time. You may use the times below if you do not have access to accurate Rahu kaal. These times are accurate only if the day lasts for 12 hours, and the sunrise is at 6.00 AM. You can adjust an approximation according to the sunrise and day length in your area.
Monday : 7:30 - 9:00
Saturday : 9:00 - 10:30
Friday : 10:30 - 12:00
Wednesday : 12:00 - 13:30
Thursday : 13:30 - 15:00
Tuesday : 15:00 - 16:30
Sunday : 16:30- 18:00