Shattila Ekadashi, the fast to worship Lord Vishnu with black sesame, is on Monday, January 20. The Ekadashi date of the Krishna Paksha of the Magh month of the Hindu calendar is popularly known as Shattila Ekadashi. Lord Vishnu and Shri Krishna are worshiped on this day in a formal manner. The use of black sesame has special significance during worship. Using black sesame on Shatila Ekadashi eliminates all sins. On this day, black cow is also important in worship.