Mexico has had 3 fully-fledged, operational constitutions: those enacted in 1824, 1857, and 1917. The 1917 Constitution was drafted in Santiago de Querétaro during the Mexican Revolution.
Día de la Constitución (Constitution Day) on February 5 is an annual Fiestas Patrias or public holiday in Mexico to commemorate the promulgation of the Constitution.
The Constitution was approved by the Constitutional Congress on 5 February1917, with Venustiano Carranza serving as the first president under its terms.