What is Rahu Kaal?
Rahu Kaal is a daily inauspicious window of roughly 90 minutes, avoided for starting new work.
Rahu Kaal is a period each day ruled by the shadow planet Rahu, traditionally avoided for beginning anything important. It lasts about one-eighth of the daytime.
How it is found
The time between sunrise and sunset is divided into eight equal parts. Which part is Rahu Kaal depends on the weekday — it is not the same clock time every day.