Ganesh Chaturthi, also known as Vinayaka Chaturthi or Vinayaka Chavithi or Vinayagar Chaturthi, is a Hindu festival that tributes Hindu deity Ganesha. The festival is marked with the installation of Ganesha's clay murtis privately in homes and publicly on elaborate pandals. Observances include chanting of Vedic hymns and Hindu texts, such as prayers and vrata (fasting). Offerings and prasada from the daily prayers, that are distributed from the pandal to the community, include sweets such as modak as it is believed to be a favourite of Lord Ganesha. The festival ends on the tenth day after start, when the Murti is carried in a public procession with music and group chanting, then immersed in a nearby body of water such as a river or sea, called visarjana on the day of Ananta Chaturdashi. In Mumbai alone, around 150,000 Murtis are immersed annually. Thereafter the clay Murti dissolves and Ganesha is believed to return to his celestial abode.

Ganesha, also spelled Ganesh, and also known as Ganapati, Vinayaka, and Pillaiyar, is one of the best-known and most worshipped deities in the Hindu pantheon and is the Supreme God in the Ganapatya sect. His depictions are found throughout India. Hindu denominations worship him regardless of affiliations. Devotion to Ganesha is widely diffused and extends to Jains and Buddhists and beyond India.