Krsna performs rasa lila of two varieties, one in the autumn season and one in the spring season, on vaisakha purnima. Balarama also performs rasa dance at this time.
In order to keep the gopis in Vrndavana satisfied, Lord Balarama stayed there continually for two months, namely the months of Caitra and Vaisakha. For those two months he kept himself among the gopis and he passed every night with them in the forest of Vrndavana in order to satisfy their desire for conjugal love. Thus Balarama also enjoyed the rasa dance with the gopis during those two months.
The purnima or full moon of Damodara month is the second full moon of the autumn season, and rasa lila is again celebrated. This second rasa yatra is celebrated more in Bengal, whereas the first one is celebrated more in Vrndavana. On this day one should perform full worship of Radha and Krsna with many flowers, and place them in a rasa mandapa surrounded by the gopis. Sri Krishna Vasant Rasa is similar excepting that it is in the Spring (Vasant), at this time everyone dresses in yellow. On this full moon night the devotees usually leave out pots of sweet rice payasam for the Lord to enjoy during His rasas.