History and significance of Diwali, the Festival of Lights

Deepawali, Deepavali, or Diwali is the biggest and the brightest of all Hindu festivals. It is the Festival of Lights: deep means “light” and avali “a row” to become “a row of lights”. Diwali is marked by five days of celebration, which literally illuminates the country with brilliance and dazzles people with joy.
The Diwali festival occurs in late October or early November. It falls on the 15th day of the lunar Hindu month of Kartik, so it varies every year. Each of the five days in the festival of Diwali is marked with a different tradition. What remains constant is the celebration of life, its enjoyment, and a sense of goodness.
Historically, Diwali can be traced back to ancient India. It most likely began as an important harvest festival. However, there are various legends pointing to the origin of Diwali. Some believe it to be a celebration of the marriage of Lakshmi, the goddess of wealth, to Lord Vishnu. Others use it as a celebration of her birthday, as Lakshmi is said to have been born on the new-moon day of Kartik.
Diwali also commemorates the return of Lord Rama (along with Ma Sita and Lakshman) from his 14-year exile and vanquishing of the demon-king Ravana. In joyous celebration of the return of their king, the people of Ayodhya, the capital of Rama, illuminated the kingdom with earthen diyas (oil lamps) and set off firecrackers.
Each day of Diwali has its own tale to tell. The first day of the festival, Naraka Chaturdasi, marks the vanquishing of the demon Naraka by Lord Krishna and his wife, Satyabhama.
Amavasya, the second day of Diwali, marks the worship of Lakshmi when she is in her most benevolent mood, fulfilling the wishes of her devotees. Amavasya also tells the story of Lord Vishnu, who, in his dwarf incarnation, vanquished the tyrant Bali and banished him to hell. Bali is allowed to return to earth once a year to light millions of lamps and dispel darkness and ignorance while spreading the radiance of love and wisdom.
It is on the third day of Diwali, Kartika Shudda Padyami, that Bali steps out of hell and rules the earth according to the boon given by Lord Vishnu. The fourth day is referred to as Yama Dvitiya (also called Bhai Dooj), and on this day sisters invite their brothers to their homes.
Some people refer to Diwali as a five-day festival because they include the festival of Dhanteras (dhan meaning “wealth” and teras meaning “13th”).

This celebration of wealth and prosperity occurs two days before the Festival of Lights.
The tradition of gambling on Diwali also has a legend behind it. It is believed that on this day, Goddess Parvati played dice with her husband, Lord Shiva. She decreed that whosoever gambled on Diwali night would prosper throughout the ensuing year.
All of the simple rituals of Diwali have a significance and a story behind them. Homes are illuminated with lights, and firecrackers fill the skies as an expression of respect to the heavens for the attainment of health, wealth, knowledge, peace, and prosperity.
The spiritual significance of Diwali
Beyond the lights, gambling, and fun, Diwali is also a time to reflect on life and make changes for the upcoming year. With that, there are a number of customs that revellers hold dear each year.
Give and forgive. It is common practice that people forget and forgive the wrongs done by others during Diwali. There is an air of freedom, festivity, and friendliness everywhere.
Rise and shine. Waking up during the Brahmamuhurta (at 4 am, or 1 1/2 hours before sunrise) is a great blessing from the standpoint of health, ethical discipline, efficiency in work, and spiritual advancement. The sages who instituted this Diwali custom may have hoped that their descendants would realise its benefits and make it a regular habit in their lives.
Unite and unify. Diwali is a unifying event, and it can soften even the hardest of hearts. It is a time when people mingle about in joy and embrace one another.
Prosper and progress. On this day, Hindu merchants in North India open their new account books and pray for success and prosperity during the coming year. People buy new clothes for the family. Employers, too, purchase new clothes for their employees. Homes are cleaned and decorated by day and illuminated by night with diyas. The best and finest illuminations can be seen in Bombay and Amritsar. The famous Golden Temple at Amritsar is lit in the evening with thousands of lamps.
This Festival instils charity in the hearts of people, who perform good deeds. This includes Govardhan Puja, a celebration by Vaishnavites on the fourth day of Diwali. On this day, they feed the poor on an incredible scale.
Illuminate your inner self. The lights of Diwali also signify a time of inner illumination. Hindus believe that the light of lights is the one that steadily shines in the chamber of the heart. Sitting quietly and fixing the mind on this supreme light illuminates the soul. It is an opportunity to cultivate and enjoy eternal bliss.
From darkness unto light…
In each legend, myth, and story of Diwali lies the significance of the victory of good over evil. It is with each Diwali and the lights that illuminate our homes and hearts that this simple truth finds new reason and hope.
From darkness unto light – the light empowers us to commit ourselves to good deeds and brings us closer to divinity. During Diwali, lights illuminate and the scent of incense sticks hangs in the air, mingled with the sounds of firecrackers, joy, togetherness, and hope.
Diwali is celebrated around the globe. If you are away from the sights and sounds of Diwali, light a diya, sit quietly, shut your eyes, withdraw the senses, concentrate on this supreme light, and illuminate the soul. (Patil, SM. “Diwali: Festival of Lights Light Up Your Life)