The Legends - Deepavali

Day Before Diwali:
The celebration of Diwali lasts six days, beginning on the 12th day of the month of Kartik (as per the North Indian lunar calendar). The day before Diwali, in order to evoke the grace of God, women fast. It is not that God wants you to go hungry or takes pleasure in your suffering - the principle is that you gain only by giving up. That evening, devotees worship Gomata (the cow) and her calf and feed them special food. Women pray for the welfare of the entire family. This holy day is called Vasubaras.
1st Day: Dhanteras
The scriptures mention the divinity called Dhanvantari emerging from the churning of the ocean with a kalash (pot) filled with Amrit (ambrosia). Due to the fact that Dhanvantari, who revealed the science of Ayurveda to the world, first manifested on this day, all over India, doctors following the Ayurvedic system of medicine organise joyful celebrations of the annual Dhanvantari festival.

The first official day of Diwali falls on the 13th of Kartik as per moon calender. People set about cleaning houses and shops, and decorating doorsteps and courtyards with rangoli or multi-coloured designs. They purchase gold ornaments, new vessels, clothes, and other such items. Devotees arise early in the morning before sunrise and take oil baths. If possible, they wear new clothes. In the evening, people worship coins representing wealth. Houses and courtyards glow from the lights, and families decorate with lanterns. This day of celebration is called Dhantrayodashi or Dhanteras.

2nd Day: Naraka Chaturdashi
There is a legend about a king of Prag-Jyotishpur, named Narakasura. He was a powerful king who misused power to harass his subjects. Sri Krishna destroyed this oppressive asura king on this day. Unjustly imprisoned people celebrated their freedom with friends and family. The citizens celebrated deliverance from Narkasura's reign by lighting lamps.
The second day is called Naraka Chaturdashi. People take an oil bath in the early morning and then in the night they light lamps and burn firecrackers. People visit their relatives and friends, exchanging love and sweets.

3rd Day : Deepavali
Deepavali falls on a no-moon day - in fact the darkest day of the year. The illuminations and fireworks, joy and festivities, are to signify the victory of divine forces over the powers of darkness. On Deepavali day, triumphant Sri Rama is said to have returned to Ayodhya after defeating Ravana, the asura king of Lanka.

On the third day, people worship Lakshmi, the Goddess of wealth. People decorate their houses with lit lamps and lanterns to welcome Lakshmi to their home and hearts. On this day businessmen close old accounts and open new accounts. The earth is lit up by lamps and the skies are coloured by the multi-hued lights of fireworks.
The Puranas say that it was on this day that Goddess Lakshmi, who emerged from the churning of the ocean of milk, married Lord Vishnu, the repository of all divine qualities.

4th Day: Govardhana Puja
In order to shelter the gopis and gopas and their cows from the torrential rains sent by Indra, Krishna lifted a hill near Mathura called Govardhana with his finger and sheltered all the people for a period of seven days under it. By then Indra saw Krishna's greatness and asked him for forgiveness. Devotees in the North build hillocks made of cow dung, symbolising Govardhana, and decorate and worship them. North Indians observe this day as Annakoot, or the mountain of food.

5th Day: Bhai Dooj
The fifth day of the festival called Bhaiyya Dooj celebrates unique and fun customs. Every man dines in his sister's house, and, in return, presents her with gifts. North India calls it Yama Dwitiya. Thousands of brothers and sisters join hands and have a sacred bath in the river Yamuna.

The river Yamuna and Yama the God of Death were brother and sister. As they grew up they went their different ways. On this day Yama supposedly visited his sister Yamuna, who in her joy at seeing her brother after such a long interlude set up a feast for him. Pleased, Yama granted her a boon. He declared that every man that receives a tilak or vermilion mark on the forehead from his sister and presents her with lovely gifts on this day would attain higher worlds.