When is Diwali and how is it celebrated around the world?

Diwali, the festival of lights, is a religious observance commemorated by Hindus, Sikhs, Jains and some Buddhists around the world.

Every autumn, the observance sees millions of people attend firework displays, prayer services and festive events in celebration of the occasion.

While Diwali holds significance for a variety of reasons, one of the core themes of the festival, as symbolised by the prevalence lights, is the triumph of good over evil.