Ganesh Visarjan, which involves the immersion of Lord Ganesha's idols into water bodies, typically takes place on the last day of the Ganesh Chaturthi festival, which lasts for 1.5, 3, 5, 7, or 11 days, depending on the traditions followed by different individuals or communities. Ganesh Visarjan 2023 After 1.5 Days Date: Rituals, Dos and Don'ts, Immersion and Prayers, Everything You Need To Know About the Day.