Ganesh Puja also known as Ganesh Chaturthi, Vinayaka Chaturthi, Ganeshotsav or Ganpati Puja. The festival of Ganesha is observed in the Hindu calendar month of Bhaadrapada, starting on the shukla chaturthi. While celebrated all over India, it is most elaborate in Maharashtra, Andhra Pradesh, Karnataka and Goa. Outside India, it is celebrated widely in Nepal and by Hindus in the United States, Canada, Mauritius, Singapore, Thailand, Cambodia, Burma and Fiji.
Ganesh Puja date usually falls between 19 August and 15 September. The festival lasts for 10 or 12 days, ending on Anant Chaturdashi. In the year of 2012, Ganesh Puja date falls on 19 September, according to oriya calendar. On that day, it will be celebrated all over Orissa (Odisha) in grand way.
It is the day Shiva declared his son Ganesha as superior to all the gods. Ganesha is widely worshipped as the god of wisdom, prosperity and good fortune and traditionally invoked at the beginning of any new venture.
The environmental activists have pulled up their socks to spread awareness about environment-friendly Ganesh Chaturthi. Ganesh idols made up of clay can be used at homes. Those idols can be immersed at home itself in a bucket or a tub.