Dhammachakra Pravartan Din

Dhammachakra Anuvartan Din or Dhammachakra Anuvartan Diwas (lit. 'Dhamma Wheel's Promulgation Day') is an annual observance celebrated by Ambedkarite Buddhists in India on 14 or 15 October (corresponding to Vijayadashami in the Hindu lunar calendar). It commemorates the historic mass conversion to Buddhism led by B. R. Ambedkar on 14–15 October 1956 at Deekshabhoomi in Nagpur, Maharashtra, where approximately 600,000 Dalits renounced Hinduism and embraced Buddhism, marking the formal founding of Navayana as a socially engaged movement against the caste system. The event symbolizes the "setting in motion of the Wheel of Dhamma" in a modern context, echoing the Buddha's first discourse while emphasizing social justice and equality.

The day draws millions of participants to Deekshabhoomi for prayers, processions, and conversion ceremonies, with thousands converting annually—such as 65,000 in 2018 and over 67,500 in 2019—reinforcing its role in Buddhist revival in India.

The observance is also referred to as "Dhammachakra Anuvartan Din" to highlight the vow-taking aspect, where converts recite Ambedkar's 22 religious vows renouncing Hindu deities and affirming Buddhist integrity.