Shani Ekadashi or Sani Ekadasi (Ekadashi falls on Shanivar or Saturday) is an auspicious day to worship Lord Vishnu. In 2012, Shani Ekadasi falls for four times: Deva Sayana Ekadasi, Kamika Ekadasi, Rama Ekadashi & Utthana or Prabhodhini Ekadasi. Lord Balaji is also worshipped on Shani Ekadasi day. Venkateshwara Vratam is observed on this day.
Shani Ekadashi Vrata dates in 2012
30 June 2012: Devashayana Ekadasi (Ashadi Ekadasi)
14 July 2012: Kamika Ekadashi
10 November 2012: Rama Ekadasi
24 November 2012: Prabhodini Ekadasi