Surupa Dwadasi, or Suroopa Dwadashi, is observed during the 12th day of the waning phase of moon (Krishna Paksha) in Paush Month as per traditional Hindu calendar followed in
North India. Suroopa Dwadashi 2017 date is December 14. It is believed that Satyabhama, wife of Sri Krishna, got relieved from the curse that made her look ugly by observing the Surupa Dwadashi.
Women of certain Hindu communities observe a fast on the day. Those observing the fast collect fresh cow dung in a pot. In the evening Srihari Vishnu is worshipped along with the pot.