Panchak Shanti Puja is a Hindu ritual performed to nullify the inauspicious effects of Panchak Kaal — a specific astrological period when the Moon transits through the last five constellations (Nakshatras) of Aquarius and Pisces (Dhanishta, Shatabhisha, Purva Bhadrapada, Uttara Bhadrapada, and Revati). It is believed that activities like starting new ventures, traveling, or conducting certain ceremonies during Panchak can invite obstacles or misfortunes if remedies are not done.