Sankatahara Chatruthi, or Sankashta Chaturthi , is a monthly fasting dedicated Lord Ganesha. It is observed on the fourth day of the Krishna Paksha (waning phase of moon) in a traditional Hindu month. The Sankashti Chaturti in September 2011 is on September 16. The Sankashti Chaturthi in September 2011 is of great importance as it falls after the Ganesh Chaturthi festival. Some communities perform the Ganesh Visarjan ritual on the day.
Sankashti Chaturthi fasting is considered to be highly auspicious by Lord Ganesh devotees. Sankashta Chaturti Fasting is observed on the Chaturthi falling after full moon – fourth day after Purnima. It begins at sunrise and ends after evening puja or after sighting the moon. Lord Ganesha Temples conduct special pujas on the day.
Sankashta Chaturthi is a highly auspicious day in Marathi culture. Numerous people observe fast on the day in
Lord Ganesha is known as Pillayar and Sankatahara Shaturthi in Tamil culture and it is a highly auspicious day.
It is widely believed that observing Sankashta Chaturthi will bring prosperity, happiness and fulfillment of desires. The greatness of Sankashti Chaturthi Vrata was explained by Lord Krishna to Yudhishtira, the eldest of the Pandavas. It is also detailed in the Narasimha Purana and Bhavishaya Purana.