Rasa Kalyanini Vrata is dedicated to Goddess Lalita. The vrat is observed for desire fulfillment and is observed on the Vaishakh Shukla Paksha Tritiya or Bhadrapad or the Margashirsh Shukla Paksha Tritiya. In 2015, the Vrata is on April 21, September 16 and December 14.
The fast on the day is from sunrise to next day morning sunrise. All normal puja methods are followed.
Goddess Lalita is offered tila, rice, white flowers and fruits on the day. Sweet made of milk or honey is offered as Prasad. Clothes are donation to poor people on the day.
The Vrata can be also observed on all the Shukla Paksha Tritiya in a Hindu month.
On the Vrat day, one has to forgo salt and sugar.