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What is the significance of Rahukaalam in the Hindu Calendar?
Rahukalam is mentioned by the ancient sages as an inauspicious period of time of the day during which any activity/project/venture started during this time would not yield good results. It was said that this particular time period will be under the supervision of Rahu, who will show his evil effects and hence warn not to start any good deeds. Some of them hesitate even to go out during this period and would like to stay indoors.
According to astrologers the mighty Rahu and Ketu have the strength to even obscure the sun and moon, thus causing solar and lunar eclipses. It is considered inauspicious to undertake any important transaction during this "Rahukaal".
How is Rahukalam Calculated?
The time period of Rahukalam is for one and a half hour. The timings of Rahukalam will vary for each day in a week.
This can be remembered using a simple mnemonic “Mother Saw Father Wearing The Turban Suddenly” while each starting letter denotes the day of the week. Starting from 7:30 am on Monday, the next day (Saturday – as per the mnemonic) will have a start of Rahukalam after one and a half of the previous day mentioned.
| Day of the Week | Timings |
|---|---|
| Monday | 7:30 am to 9 pm |
| Tuesday | 3 pm to 4:30 pm |
| Wednesday | 12 noon to 1:30 pm |
| Thursday | 1:30 pm to 3 pm |
| Friday | 10:30 pm to 12 noon |
| Saturday | 9 am to 10:30 am |
| Sunday | 4:30 pm to 6 pm |
Scientific Reason
As far as the scientific reasons behind this belief are concerned, it was said that the ancient astrologers calculated that this part of the day has more UV radiation. Hence as this is the time when UV rays enter the Earth’s atmosphere from the Sun, it is considered that the bad effects of UV radiation would affect the health.
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