Diwali, also known as Deepavali or Dipvali, is a Hindu festival of lights, symbolising the victory of light over darkness, good over evil and knowledge over ignorance.
The festival takes place every autumn in the northern hemisphere (spring in the southern hemisphere), and is one of the most popular festivals in Hinduism, bringing communities together in celebration.
Indian businesses may close across the UK in order for those who work there to celebrate with friends and loved ones.
The celebrations honours Rama-chandra, the seventh incarnation of the god Vishnu.
It is believed that Rama returned to his people following 14 days of exile and a battle with the demon king, Ravana.
When is Diwali celebrated in the UK?
The festival itself is five days long, with Diwali taking place on the day before the new moon in the month of Ashwin, the seventh month of the lunisolar Hindu calendar.
The lunar calendar means the festival varies between taking place in October and November each year.
Day one of the celebration, Dhanteras, takes place on Monday, November 5, and marks the beginning of celebrations.
Then comes Choti Diwali, Naraka Chaturdasi on November 6, a day for preparing feasts and sweet treats.
Diwali takes place on the third day, Wednesday, November 7. It is a time when feasts are shared, temples visited and friends and family greeted.
Day four is Annakut, Padwa, Govardhan Puja and celebrates the bond between husband and wife.
The final day, Bhai Duj, Bhaiya Dooj celebrates the brother-sister bond and traditionally sees brothers travel to spend time with sisters and exchange gifts.
How Diwali it celebrated?
Diwali commemorates Rama’s return from exile following a battle with against demons and the demon king Ravana.
To celebrate this, Hindus light their houses to symbolise the victory of light over darkness.
Rows of oil lamps are lit, gifts and cards exchanged as well as time spent with family.
For many in Hinduism, Diwali is the beginning of the new year and celebrated with feasts, treats, bright lights and prayer.
Huge effigies of the demon king Ravana are built of straw and burned, as a symbol of being cleansed from evil.
Houses and businesses are cleaned thoroughly before the day of Diwali.
Traditionally those celebrating would don new clothes, and some even new jewellery to symbolise spiritual cleansing.
Women and girls also decorate their hands and arms with Henna tattoos.
According to the 2011 census, there are more than 815,000 Hindus in England and Wales.
Cities like London, Birmingham and Manchester hold huge Diwali celebrations, featuring live performers, food stalls and fireworks.