Ganesh Chaturdhi, also known as Vinayaka Chavithi, is a Hindu festival that falls on the fourth day of the sixth month (Bhadrapadam) of the Indian Lunar Calendar. On this day, Hindu families gather to pray to Lord Ganesha or Vinayaka, who is believed to be the remover of obstacles. A statue of the deity is installed in each household as well as a very large statue in every street. The deity is venerated for nine days, at the end of which the Ganesh/Vinayaka statues are immersed in a lake or other water body nearby.
It is prohibited to look at the moon on the night of Vinayaka Chaviti. Included in the customary rituals of this festival are offerings to Ganesh/Vinayaka of a wide variety of leaves, fruits and delicacies called "Kudumu" and "Undrallu."
Ganesh Chaturthi is an occasion or a day on which Lord Ganesha makes his presence on earth for all his devotees.
It was around 1893, during the growth of nascent Indian nationalism, that the radical nationalist Bal Gangadhar Tilak began to organize the Ganesh Utsav as a social and religious function.
This happens when the Ganesh procession uses those routes (usually as a result of lack of alternative routes due to factors like size of the procession, size of the Ganesh idol and/or the vehicle used to carry it, length of the route, etc.) that pass through places inhabited by other religious groups.