Dhanteras or Dhantrayodashi takes place two days before Diwali. It is celebrated in the honour of Dhanavantri, the physician of the gods and an incarnation of Vishnu. According to legend, when the gods and demons churned the ocean for Amrit or nectar, Dhanavantri emerged carrying a jar of the elixir. On this day, new dhan or some form of precious metal is bought as a sign of good luck. The festival is also referred as Yamadeepdaan and lamps are kept burning throughout the night in reverential adoration to Yama, the god of Death.