The Diwali festival is really five days: Dhanteras, Chhoti Diwali (Naraka Chaturdashi), the main Lakshmi Puja night, Govardhan Puja and Bhai Dooj. In 2026 a lunar day is skipped between Diwali and Govardhan Puja, so they fall on 8 and 10 November rather than back-to-back.
All dates follow the North-Indian (Delhi) panchang; regional calendars can differ by a day.