India’s population consists of 80% Hindus. Diwali is the biggest Hindu festival of the year except few corners of the country where one or two local festivals have more acceptance over Diwali.
Last week on 26th October people in India celebrated Diwali. Here in US, we celebrate over week end as its more convenient for the people at work. Needless to say back in India its a national holiday. Each year the date varies in accordance with ancient Indian lunar calendar.