7. Special Day for the Arya Samaj

It was the new moon day of Kartik (Diwali day) when Maharshi Dayananda, one of the greatest reformers of Hinduism and the founder of Arya Samaj attained his nirvana.
8. Special Day for the Jains

Mahavir Tirthankar, considered to be the founder of modern Jainism also attained his nirvana on Diwali day.
9. Special Day for the Sikhs

The third Sikh Guru Amar Das institutionalized Diwali as a Red-Letter Day when all Sikhs would gather to receive the Gurus blessings. In 1577, the foundation stone of the Golden Temple at Amritsar was laid on Diwali. In 1619, the sixth Sikh Guru Hargobind, who was held by the Mughal Emperor Jahengir, was released from the Gwalior fort along with 52 kings.
10. The Pope's Diwali Speech

In 1999, Pope John Paul II performed a special Eucharist in an Indian church where the altar was decorated with Diwali lamps, the Pope had a ‘tilak' marked on his forehead and his speech was bristled with references to the festival of light.