An annual festival honours Ganesha for ten days, starting on Ganesh Chaturthi, which typically falls in late August or early September. The festival culminates on the day of Ananta Chaturdashi, when images (murtis) of Ganesha are immersed in the most convenient body of water.
In 1893, Lokmanya Tilak transformed this annual Ganesha festival from private family celebrations into a grand public event. He did so "to bridge the gap between the Brahmins and the non-Brahmins and find an appropriate context in which to build a new grassroots unity between them" in his nationalistic strivings against the British in Maharashtra. Because of Ganesha's wide appeal as "the god for Everyman", Tilak chose him as a rallying point for Indian protest against British rule.
Tilak was the first to install large public images of Ganesha in pavilions, and he established the practice of submerging all the public images on the tenth day.Today, Hindus across India celebrate the Ganapati festival with great fervour, though it is most popular in the state of Maharashtra. The festival also assumes huge proportions in Mumbai and in the surrounding belt of Ashtavinayaka temples.
Further information: List of Ganapati temples and Ashtavinayak
In Hindu temples, Ganesha is depicted in various ways: as an acolyte or subordinate deity (pãrśva-devatã); as a deity related to the principal deity (parivāra-devatã); or as the principal deity of the temple (pradhāna), treated similarly as the highest gods of the Hindu pantheon.As the god of transitions, he is placed at the doorway of many Hindu temples to keep out the unworthy, which is analogous to his role as Parvati’s doorkeeper. In addition, several shrines are dedicated to Ganesha himself, of which the Ashtavinayak (Sanskrit: अष्टविनायक; aṣṭavināyaka; lit. "eight Ganesha (shrines)") in Maharashtra are particularly well known. Located within a 100-kilometer radius of the city of Pune, each of these eight shrines celebrates a particular form of Ganapati, complete with its own lore and legend; together they "form a mandala, demarking the sacred cosmos of Ganesha".
There are many other important Ganesha temples at the following locations: Wai in Maharashtra; Ujjain in Madhya Pradesh; Jodhpur, Nagaur and Raipur (Pali) in Rajasthan; Baidyanath in Bihar; Baroda, Dholaka, and Valsad in Gujarat and Dhundiraj Temple in Varanasi, Uttar Pradesh. Prominent Ganesha temples in southern India include the following: : the Jambukeśvara Temple (Ucchi pillaiyar kottai) at Tiruchirapalli; at Rameshvaram and Suchindram; Karpaka Vinayakar Temple in TamilNadu; Hampi, Kasargod, and Idagunji in Karnataka; and Bhadrachalam in Andhra Pradesh.