Labor Day is observed in Trinidad and Tobago every June 19, commemorating the labor riots of 1937 that initiated the country's modern trade union movement. The riots were part of broader labor unrest in the British West Indies from 1934 to 1939, highlighting wealth inequalities in the region. Key figure Tubal Uriah Butler led significant protests, including a hunger march in 1935, and the pivotal riots began in southern Trinidad, where oilfield workers protested against low wages, poor working conditions, exploitation, and racism. The unrest spread across various sectors, culminating in the establishment of the Oilfield Workers' Trade Union on July 25, which became a powerful organization in the country. The anniversary of these labor riots is now celebrated as Labor Day, honoring the achievements of the labor movement in Trinidad and Tobago.