Rahu Kaal is an inauspicious time period occurring daily, lasting approximately 1.5 hours (one-eighth of the day between sunrise and sunset). It is governed by Rahu, a shadow planet (Chhaya Graha) in Vedic astrology associated with confusion, obstacles, and unexpected outcomes. The timing varies by day of the week: Monday (7:30-9:00), Saturday (9:00-10:30), Friday (10:30-12:00), Wednesday (12:00-1:30), Thursday (1:30-3:00), Tuesday (3:00-4:30), Sunday (4:30-6:00) — these are approximate times that shift with sunrise/sunset. Hindus avoid starting new ventures, signing documents, traveling, or beginning important activities during Rahu Kaal. However, ongoing routine work is considered acceptable. Worship of Lord Ganesha or Goddess Durga can mitigate Rahu's effects.