Diwali, The Victory Of Good Over Evil. India's Most Important Festival?

Diwali is written shorthand for Deepavali 
Wikipedia

http://en.wikipedia.org/wiki/Diwali

Diwali Photo Album

http://www.washingtonpost.com/world/hidus-celebrate-diwali/2013/11/02/b619cf6a-43fa-11e3-a624-41d661b0bb78_gallery.html?tid=pm_world_gal#photo=1

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Within 10-20 years, India will become the most populous nation on earth, 
displacing China from #1 ranking.