Today, 11 October 2012 is Ekadasi (Indira Ekadasi). It is also referred to as Shraddh Ekadasi as it falls during Pitru Paksha Mahalaya.
Indira Ekadasi falls on 11th day of Krishna Paksha of Ashwin Month in North Indian Hindi calendar.
It falls during Bhadrapad Month as per Marathi, Telugu, Kannada & Gujarati Panchang.
Indira Ekadasi Vrat Katha is associated with King Indrasena. Story of this Ekadasi is mentioned in the Brahma Vaivarta Purana as a conversation between Lord Krishna and King Yudhishtira.