The Ekadasi that is observed during the Krishna Paksha or waning phase of moon in Adhika Masa or extra month in a Hindu Lunar calendar is known as Parama Ekadashi. Parama Ekadasi 2023 date is August 12. Observing this Ekadasi is believed to help in removing sins and it also brings in material progress.
Adhika Masa, or the extra month, in a lunar calendar is dedicated to Lord Vishnu and therefore the Ekadasi is also known as Purushottam Kamala Ekadasi. As the month is dedicated to Vishnu, observing this Ekadasi is considered highly rewarding.
All the usual rules associated with Ekadasi fasting are observed on the day.