The fourth day of Krishna paksha (waning phase of the moon) of every lunar month in the Hindu calendar is celebrated as Sankashti Chaturthi, the day dedicated to Lord Ganesha.
The special Ekadasi that is celebrated during the Krishna Paksha (waning moon period) of Magh month (North India) and Paush (other parts of India) is known as Sattila Ekadasi or Tilda Ekadasi. This Ekadasi derives its name from the usage of til (sesame seeds) in the following sat (six) ways for spiritual purification.
• Bathing in the water mixed with sesame seeds
• Rubbing sesame seed paste on the body
The ashtami (eighth day) in the Krishna paksha (waning phase of the moon) of the Chaitra month (South India)/ Phalguna month (North India) of the is celebrated as Sheetala Ashtami. The festival is dedicated to Sheetala Devi, the goddess worshipped to ward off diseases like measles, small pox, chickenpox, cholera and various other skin diseases too.
The Ekadasi that falls in the Krishna Paksha (waning phase of the moon) of Phalguna month was faithfully observed by a great epic hero, Lord Rama to gain vijaya (victory) over Ravana! The glories of this Ekadasi known as Vijaya Ekadasi are explained by Lord Krishna to King Yudhishtira in the .
Navratri is the 10 days and 9 nights festival celebrated in the honour of Goddess Durga in her 9 major forms. The most important Navratri celebrated in a year are Chaitra Navratri (March-April) and Sharad Navratri (September-October).
Chaitra Navratri, also known as Vasant Navratri is celebrated during the Shukla pasha (waxing phase of the moon) in the month of Chaitra and concludes with festival. Chaitra Navratri is thus rightly called as Rama Navratri too.
The Ekadasi that occurs during the Krishna paksha (waning phase of the moon) of the Chaitra month not only destroys the sins but also gives freedom from the guilt associated with committing the sins. This special Ekadasi is known as Papamochani Ekadasi, wherein “Papa” refers to sins and “mochan” refers to release.
Upon the request of King Yudhishtira, Lord Krishna narrates the glories of Papamochani Ekadasi as told earlier by Lomasa Rishi to King Mandhata. The glories of Papamochani Ekadasi are described in the Bhavishyottara Purana.