This festival is celebrated on the Shukla Dasami of the Jyestha month according to the Hindu calendar or the months of May/June according to the English calendar. On this special day the sacred River Ganga is worshipped and Dussehra posters adorn the doors of houses and temples. One can get salvation from 10 of his/her sins during this festival by donating and taking a dip or bath at ghats of Ganga. Overview/History. Ganga Dussehra is celebrated in the month of June, called as Jyeshtha as per the Hindu calendar.