*Mohini Ekadashi* (mohini- one avatar of lord vishnu among dasa avatar when distribution of amrut .mohini lord vishnu save to have amrit from asura )
Mohini Ekadashi is very significant among the Ekadashi's. Observed in the month of Vaisakha / April-May, this day falls during the Shukla Paksha or the waxing phase of the moon. Sage Vashistha explained the greatness of the day to Lord Rama and Lord Krishna to King Yudhisthira.
On this day, Lord Rama / Lord Vishnu is worshiped with great devotion and reverence. It is said that People who observe a fast on this day enjoy a happy and content life forever. It is believed that, Lord Rama himself observed fast on this day.
*Mohini Ekadashi Vrat Katha*
A wealthy merchant, Dhanapala was a loyal devotee of Lord Vishnu and involved in charitable and spiritual activities. His son Dhrastabuddhi was entirely different from his father. His bad associations led to him getting thrown out of the house. As a pauper, he indulged in the robbery and was caught. Because of his father’s impeccable reputation, he was asked to leave the kingdom. He roamed around in the jungles, years together, feeding on the animals. He reached Sage Kaundinya’s Ashram. Rishi Kaundinya guided him to observe Mohini Ekadashi Vrat to annul his guilt and sins.
Fasting on Mohini Ekadashi day is more pious than having Holy dip in the holy rivers or performing sacrifices.