Q: First quesion on Diwali why do some people call it Diwali and some Deepawali? Second question how did trhe clebration start?
A: Deepavali is the southern indian way of pronouncing it while diwali is the northern indian way of saying it. Both exists. However now diwali is used more as it is shorter and concise to say. Deepavali means to through the brightness of light. It is the celebration of the triump of goodness versus evil.