The history of Diwali comes from the epic Ramayana on the return of Shri Ram along with his wife Sita after vanquishing The king Of Lanka, Ravana, to his kingdom Ayodhya. So the denizens of Ayodhya celebrated the return of their king by lightening with lamps.
On this occasion Ma Laxmi, the goddess of wealth and prosperity also worshiped by people thorough out the India. It is a symbol of making a new beginning by doing away with all belongings and wares. People whitewash their house and also decorated their house with light oil lamps, candles, and many use to decorate with small bulbs runs by electricity. People buy new clothes and prepared various types of sweets to celebrate. I n the evening everyone wears new close and prays to God . It is generally celebrated in North India.
In South the context of Diwali is different. The history is based on Lord Krishna slaying Narakasura. The South Indians wake up early in the morning, pray to god, lightening crackers with having a grand feast.
This festivals teaches us a lot. We can learn that happiness and sorrow is a part of our life, and one follows the other. Lightening lamp is the way to make our life bright by prevading darkness. It teaches us to never give up hope which helps us to look forward. The better time will definitely come in life.