Apara Ekadashi, also known as Achala Ekadashi or Bhadrakali Ekadashi, is an auspicious day observed in Hinduism. It falls on the eleventh day of the dark fortnight (Krishna Paksha) in the Hindu month of Jyeshtha, which usually corresponds to the months of May or June in the Gregorian calendar. This Ekadashi holds great significance and is believed to bestow immense spiritual benefits on its observers.