The Manusmriti Dahan Diwas (Manusmriti Burning Day), during the Great struggle (Maha-Sangharsha) of Mahad Satyagraha, was day on 25 December 1927 that Manusmriti (an ancient Cast system-upholding text of Hinduism) was publicly burned by Dr. B. R. Ambedkar. It was an important mile stone in Dalit struggle against Brahminism by Dalits led by Babasaheb Ambedkar. Manusmriti (or Manusmṛti) is probably the most burnt book in India every year by Dalits and Ambedkarites.
Dr. Ambedkar came from Bombay by boat "Padmavati" via Dasgaon port, instead of Dharamtar, though it is longer distance, because in the event of boycott by bus owners, they could walk down five miles to Mahad. A pit six inches deep and one and half foot square was dug in, and filled with sandle wood pieces. On its four corners, poles were erected, bearing banners on three sides. Banners said,
On 25 December 1927, at 9 p.m. the book of Manusmṛti was kept on this and burned at the hands of Bapusahib Sahastrabuddhe and another five six dalit sadhus.