Ashadi Ekadasi, also spelt as Ashadhi Ekadashi, is the most important Ekadasi vrata observed as first Ekadashi. It falls on eleventh day in bright half of Ashad Maas. Ashadi Ekadashi 2012 date is June 30. Also popular as Devshayani Ekadashi or Sayana Ekadasi or Harisayani Ekadashi or Harivasara Ekadasi, Ashadi Ekadasi marks the celebration of Pandharpur Palki Yatra in Vithoba Temple in Maharashtra. 17-days long Ashadi Waari Palki Yatra concludes on Ashadi Ekadasi day in Pandharpur Vithal Temple.
As per many legends associated with Ashadi Ekadasi, Lord Vishnu goes on to Yog nidra (cosmic meditation) on this day for four months. These four months holy period is observed as Chaturmas Puja. Sri Maha Vishnu opens his eyes and gets up from the cosmic sleep on Utthana Ekadasi (Dev Prabodhini Ekadashi) which is also popular as Kartik Ekadashi. In Pandharpur Vithoba Temple, Kartik Ekadasi Yatra is another important pilgrimage festival.