Mohini Ekadashi occurs during the Shukla Paksha waxing phase of moon in the month of April/May. It is believed that one will be able to overcome sadness and remorse by observing Mohini Ekadasi. Importance of Mohini Ekadashi is mentioned in the Surya Purana. The greatness of it was narrated to Yudhishtira by Lord Krishna. It is said that Lord Vashishta told Lord Ram to observe Mohini Ekadashi to get over his sadness and guilt on being separated from Mata Sita.