On the day of Trayodashi of Krishna Paksha of Kartik month, Lord Dhanvantari appeared with nectar kalash at the time of ocean, so this date is known as Dhanteras or Dhantrayodashi. The Government of India has decided to celebrate Dhanteras as National Ayurveda Day.
Lord Dhanwantari is worshiped on the day of Dhanteras. On the auspicious occasion of Dhanteras, Lord Ganesha, Mata Lakshmi and Kubera Ji are also worshiped along with Dhanvantari. The festival of Deepawali starts from Dhanteras itself.
It is believed that buying gold, silver and utensils on the auspicious day of Dhanteras maintains prosperity throughout the year.