Rukmini Vrata is observed on the eighth day during the waning phase of moon (Krishna Paksha Ashtami) in Margashirsh month as per traditional Hindu calendar followed in North India. Rukmini Vrata 2015 date is December 3. Married women for begetting children observe the Vrata.
A fast is observed on the day from sunrise to till moonrise. Married women offer prayers to Shiva, Parvati and Sri Krishna on the day.
Rukmini Vrat Katha is read by those women observing this fast.