Known as the “Festival of Lights,” Diwali is one of the most widely celebrated holidays in India and across the Indian diaspora, including in the U.S. Many celebrate it with food, gifts and fireworks.

Millions of Indians celebrated Diwali on Sunday with a Guinness World Record number of bright earthen oil lamps as concerns about air pollution soared in the South Asian country.

Indians celebrated Diwali on Monday as bright oil lamps and colorful lights lit up homes and streets across the country to mark the Hindu festival that symbolizes the victory of light over darkness.

Diwali celebrates lightness over darkness and is celebrated by more than 1 billion Hindu people each year. It also has its own versions in the Buddhism, Sikhism and Jainism religions.

Hindus in India and across the world are celebrating Diwali, the five-day festival of lights. Here's what celebrations look like across India.

The holiday, which marks the new year, is observed over five days in various ways, from decorating with lights, praying at the temple and feasts with loved ones. Much of that is different this year.

Air quality is awful in New Delhi in winter. Smoke from the fireworks of the Hindu festival of lights adds to the problem. That's a cause for concern during a pandemic caused by a respiratory virus.