Indira Ekadashi as kept by Vaishnavas; observed a day later when Dashami touches Ekadashi

Vaishnava Indira Ekadashi is the same sacred fast of Indira Ekadashi, observed by Vaishnava sampradayas — ISKCON, Gaudiya, Sri Vaishnava, Madhva and Pushti Marg devotees — on the following day. The two dates arise from different rules for choosing the fasting day. Smarta tradition fasts on the day Ekadashi prevails at sunrise, but Vaishnava tradition, following the Hari Bhakti Vilasa, rejects an Ekadashi that is touched by Dashami at arunodaya, the hour and a half before sunrise, holding such a day to be viddha (contaminated). In that case the Vaishnava fast moves to the next day, when Ekadashi and Dwadashi meet. The purpose is the same: to please Lord Vishnu and, on this particular Ekadashi, to win the release of the ancestors as King Indrasena did for his father in the Padma Purana. Devotees keep the day in fasting, chanting, kirtan and reading of scripture, offer tulsi to Krishna or Vishnu, and break the fast in the parana window the next morning.

Vaishnavas avoid all grains and beans; many keep nirjala or take only fruit and milk.