Rahu kaalam and Yama kandam are to be avoided for starting auspicious / important activities, as they are considered the period when obstructing forces are in play
Rahu Kaalam is linked to the 8th Graham among Nava Graham. This is typically an asubha graham, a time set aside for Raahu. It is 90 minutes, which varies from day to day.
You can ask alexa for standard Raghu kalam and Yamagandam timings. You can ask for today tomorrow or any day of week raghu kalam and yamagandam timings.
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