On December 13th 1974, the Maltese constitution was substantially revised.
This effectively changed Malta from being a Commonwealth realm into a republic. The British monarch was no longer head of state and Sir Anthony Mamo became the first president of Malta.
Despite independence and becoming a republic, British troops did not leave Malta until March 31st 1979; this was the first time in its long history that Malta was free from foreign soldiers. That day is commemorated by another public holiday – Freedom Day.
December 13th is also the Feast Day of Saint Lucia, the patron saint of Malta.