This event is celebrated as a public holiday on September 24th.
The date was removed from the official calendar of holidays from 1999 to 2001 to make way for the Spiritual Baptist (Shouter) Liberation Day which is celebrated on March 30th.
The Republic Day holiday was reinstated in 2002.
When Trinidad and Tobago achieved independence on August 31st, 1962, the monarchy continued, in that, Her Majesty the Queen remained the Queen of Trinidad and Tobago and all citizens continued to owe allegiance to Her.
After many years of being a monarchy, it was decided that Trinidad and Tobago should no longer be required to owe allegiance to the Queen and should therefore become a Republic having a Head of State in its own right.
Trinidad and Tobago became a Republic on August 1st, 1976.
The event was celebrated as a public holiday on September 24th because this is the date when the first Parliament met under the new Republican Constitution.