diwali Known as Deepavali (தீபாவளி) in Tamil Nadu, it commemorates the death of Narakasura at the hands of Lord Sri Krishna. It is believed that Narakasura, a malevolent demon, tortured common people and they prayed to lord Krishna to defeat him. The people then celebrated Narakasura's defeat with sparklers, lights and firecrackers.
This celebration has continued down the generations as Diwali. In Tamil Nadu, Diwali falls on the 14th day preceding the amavasya (new moon) in the solar month of Aippasi(ஐப்பசி).[citation needed] The day begins with an early morning oil bath, wearing new clothes, bursting of firecrackers, visiting Lord Ganesha, Lord Vishnu and Shiva temples. The exchange of sweets between neighbours, visiting relations, and preparing Diwali special sweets are traditions of the day.
Typical Deepavali celebrations begin with waking up early in the morning, before sun rise, followed by an oil-bath. The bathing tradition involves extensive massaging of warm til-oil containing pepper corns and betel leaves. New clothes are typically worn as a part of celebrations. After the bath, a home-made medicine known as "Deepavali Lehiyam" is consumed, which is supposed to aid in soothing digestive problems that may ensue because of feasting that occurs later in the day. Sparklers, firecrackers and lights are used extensively, much like the rest of the world where Deepavali is celebrated.
Tamil Nadu always celebrates diwali on the day of, Naraka Chaturdashi preceding new moon in the month of aippasi. In Tamil Nadu, Diwali is calculated when chaturdashi prevails during sunrise, precisely at 4am-6am. If chaturdashi prevails after 6am it is not considered. For example, if chaturdashi tithi begins at 2:30 pm the preceding day and ends at 1pm next day, the next day will be celebrated as Diwali.
On diwali day Lamps are not lit on evening in Tamil Nadu.Lamps are lit on the night of Karthikai Deepam, in the Tamil solar month of Karthikai.Also lakshmi puja is not very important .Most important diwali ritual is "Kedara gowri vratam" also known as"nombu"(நோன்பு) which would be done by most families on amavasya day.Some families do it on Chaturdashi day.