Diwali, also known as Deepavali, is one of the most significant events celebrated in Trinidad and Tobago. The festival is a significant celebration by Trinidadian Hindus who form a considerable percent of the nation's diverse cultural fabric. Diwali usually takes place between the mid of October and mid-November, depending on the cycle of the moon. It signifies the triumph of light over darkness and good over evil in alignment with the ancient Hindu epic, Ramayana.

During Diwali, various rituals and customs are practiced not just by the Hindu community but by a significant proportion of the general population as well. Homes and public spaces are lit with deyas, traditional clay oil lamps, to embody the victory of light over darkness. Additionally, the holiday is characterized by the distribution of Indian sweets, the creation of rangoli--colorful, patterned displays often made from rice or powder--and singing and dancing to traditional Indian music.

The festival holds a special place in the national calendar of Trinidad and Tobago, as on this day, all businesses and schools are closed so that everyone can partake in the festivities. In addition to the rituals practiced at home, there are grand public celebrations. Numerous cultural programs are arranged that leverage the opportunity to educate everyone about the culture associated with the festival. These events make Diwali in Trinidad and Tobago a unique blend of traditional Hindu rituals and Caribbean festivities.

Other Trinidad and Tobago Public Holidays