Dhanteras

Dhanteras (Hindi: धनतेरस), also known as Dhanatrayodashi () or Dhanvantari Trayodashi, is the first day of the festival of Diwali in India and the festival of Tihar in Nepal.
Dhanteras is celebrated on the thirteenth lunar day of Krishna Paksha ("dark fortnight" in the moon's cycle) in the Vikram Samvat Hindu calendar month of Ashwin. Dhanvantari, who is also worshipped on Dhanteras, is the god of Ayurveda who brought and shared the wisdom of Ayurveda for the betterment of mankind and to bring relief from the suffering of disease with Ayurvedic remedies.
The Indian ministry of AYUSH (Ayurveda, Yoga and Naturopathy, Unani, Siddha and Homoeopathy), announced its decision to observe Dhanteras as the “National Ayurveda Day.” This day was first observed on October 28, 2016.