Diwali in other parts of the world
With more and more Indians now migrating to various parts of the world, the number of countries where Diwali is celebrated has been gradually increasing. While in some countries it is celebrated mainly by Indian expatriates, in others it has become part of the general local culture. Diwali is celebrated in the following countries: Australia, Canada, Fiji, Guyana, India, Indonesia, Japan, Malaysia, Mauritius, Myanmar, Nepal, Netherlands, Singapore, Sri Lanka, South Africa, Suriname, Thailand, Trinidad and Tobago, United Arab Emirates, United Kingdom, and the United States. In most of these countries Diwali is celebrated on the same lines as described in this article with some minor variations. Some important variations are worth mentioning.
Nepal
In Nepal, Diwali is known as "Tihar" and celebrated during the October/November period. Here the festival is celebrated for five days and the traditions vary from those of India. On the first day, cows are given offerings, in appreciation of the food they have given and agricultural work they have performed. On the second day, dogs and all living animals are revered and offered special food. On the third day, celebrations follow the same pattern as in India, with lights and lamps and much social activity. On the fourth day, Yama, the Lord of Death, is worshipped and appeased. On the fifth and final day, brothers and sisters meet and exchange pleasantries.
Trinidad &Tobago In Trinidad and Tobago, communities all over the islands get together and celebrate the festival. One major celebration that stands out is the Divali Nagar, or Village of the Festival of Lights. It features stage performances by the east Indian cultural practitioners, a folk theatre featuring skits and plays, an exhibition on some aspect of Hinduism, displays by various Hindu religious sects and social organizations, nightly worship of Goddess Lakshmi, lighting of oil lamps, performances by various schools related to Indian culture, and a food court with Indian and non-Indian vegetarian delicacies. The festival culminates with magnificent fireworks displays ushering in Diwali. Thousands of people participate in an atmosphere typically devoid of alcohol and in a family environment.
Malaysia
In Malaysia, Diwali is known as "Hari Deepavali," and is celebrated during the seventh month of the Hindu solar calendar. It is a federal public holiday throughout Malaysia. In many respects it resembles the traditions followed in the Indian subcontinent. "Open houses" are held where Hindu Malaysians welcome fellow Malaysians of different races and religions to their house for a sumptious meal. "Open house" or "rumah terbuka" is a practice very much unique to Malaysia and shows the goodwill and friendly ties practised by all Malaysians during any festive occasion.
Singapore
In Singapore, the festival is called "Deepavali," and is a public holiday. Observed primarily by the minority Indian community, it is typically marked by a light-up in the Little India district and is most known for the fire-walking ceremonies not practiced as part of the festival in other countries. The Hindu Endowment Board of Singapore along with Singapores' government organize many cultural events around Diwali time.
Sri Lanka
In Sri Lanka, this festival is also called "Deepavali" and is celebrated by the Tamil community. On this day, it is traditional for people to wear new clothes and exchange pleasantries.

[credit to manesha76]