2019-2020 marks the 40th anniversary of the Lydians as a musical organization in Trinidad and Tobago. On Friday 13th December 2019 at Queen's Hall, all were invited to the festive opening of the launch of a year of musical and non-musical events in celebration of this joyous milestone. The annual Christmas concert entitled DEO GRATIAS, ran from the 12th to 15th December, and began the anniversary year, which will conclude in September 2020.