Diwali.

Diwali or Deepawali popularly known as the "festival of lights", is an important festival in Hinduism, Jainism, and Sikhism, celebrated for different reasons, occurring between mid-October and mid-November. For Hindus, Diwali is one of the most important festivals of the year and is celebrated in families by performing traditional activities together in their homes. For Jains, Diwali marks the attainment of moksha or nirvana by Mahavira in 527 BC. For Sikhs, Diwali is celebrated as Bandhi Chhor Diwas and celebrates the release from prison of the sixth guru, Guru Hargobind, who also rescued 52 Hindu kings held captive by Mughal Emperor with him in the Gwalior Fort in 1619. Diwali falls on the one new moon night between mid-October and mid-November. Deepavali is celebrated for five days according to the lunisolar Hindu Calendar. It begins in late Ashvin and ends in early Kartika (between October and November). The first day is Dhan Teras. The last day is Yama Dvitiya, which signifies the second day of the light half of Kartika. Each day of Deepavali marks one celebration of the six principal stories associated with the festival. Deepavali marks the end of the harvest season in most of India. Farmers give thanks for the bounty of the year gone by, and pray for a good harvest for the year to come. Traditionally this marked the closing of accounts for businesses dependent on the agrarian cycle, and is the last major celebration before winter. Lakshmi symbolizes wealth and prosperity, and her blessings are invoked for a good year ahead.
There are two legends that associate the worship of Lakshmi on this day. According to the first legend, on this day, Lakshmi emerged from Kshira Sagar, the Ocean of Milk, during the great churning of the oceans, Samudra manthan. The second legend relates to the Vamana avatar of the big three Vishnu, the incarnation he assumed to kill the demon king Bali. On this day, Vishnu came back to his abode the Vaikuntha; so those who worship Lakshmi receive the benefit of her benevolent mood, and are blessed with mental, physical and material well-being.For Sikhs, Diwali is important because it celebrates the release from prison of the sixth guru, Guru Hargobind Ji and 52 other princes from the Gwalior Fort in 1619. The Sikhs celebrated the return of Guru Hargobind by lighting the Golden Temple and this tradition continues today.In New Zealand, Diwali is celebrated publicly among many of the South Asian diaspora cultural groups. There are main public festivals in Auckland and Wellington, with other events around the country becoming more popular and visible. An official reception has been held at the New Zealand Parliament since 2003. Divali is celebrated by Hindus. The festival signifies the triumph of light over darkness, justice over injustice, good over evil and intelligence over ignorance. Lakshmi Mata is worshipped at this festival. Lakshmi Mata is the goddess of light, wealth and beauty. Special Divali foods are barfi and Prasad.