6. India: Diwali
In this Hindu celebration, a five-day long “festival of lights,” special clay lamps are lit that signify the triumph of good over evil. The day falls on Amavasyaa, or when the moon doesn’t rise and they’re constant darkness. Diwali celebrants then light their homes up as much as possible. Fireworks, colorful clothes and meals with friends and family are commonplace during the festival, one of the most important in the Hindu religion.