Bhishma Ashtami Snan is observed on the Magh Shukla Paksha Ashtami – eighth day of the Magh Month – as per traditional Hindu Lunar Calendar. In 2017, Bhishma Ashtami Snan is on February 4. The Snan or bathing on holy rivers on the day is considered highly meritorious.
People also perform Bhishma Ashtami Tarpan (rituals dedicated to dead) on the day on river banks. It is dedicated to Bhishma and forefathers.
Bhishma Ashtami Snan is mainly held in parts of North India and