Today is Deepavali, I would like to wish all Indians a very Happy Deepavali. So What exactly is Deepavali?
Well actually it is :

Deepavali is a festival where people from all age groups participate. They give expression to their happiness by lighting earthen ‘diyas’ (lamps), decorating the houses, bursting firecrackers and inviting near and dear ones to their households for partaking in a sumptuous feast. The lighting of lamps is a way of paying obeisance to god for attainment of health, wealth, knowledge, peace, valor and fame.

For more information about what is Deepavali, click here and for the history of Deepavali, click here.