Ekadashi fast is observed on every Ekadashi date, which comes twice in a month. One Ekadashi in Krishna Paksha and the other Ekadashi in Shukla Paksha. Ekadashi of Krishna Paksha of July month is called Yogini Ekadashi and Ekadashi of Shukla Paksha is called Devshayani Ekadashi. Ekadashi fast is dedicated to Lord Vishnu