Updated October 25, 2016. Definition: A budget deficit is when spending is greater than the revenue received for that year. That's known as deficit spending. The national debt is the accumulation of each year's deficit. When revenue exceeds spending, that creates a budget surplus.
Quick Answer. Mexico gained independence from Spain on Sept. 27, 1821. On Sept. 16, 1810, Miguel Hidalgo y Costilla declared independence from Spain by issuing the Grito de Dolores and launched the Mexican War of Independence. The war ended with the signing of the Treaty of Cordoba on Aug. 24, 1821.
There, he made a speech known as the Grito de Dolores (Cry of Dolores), where he called for a rebellion so that Mexicans, rather than Spaniards, could govern Mexico. Although Mexico did not officially become independent from Spain until 1821, Mexicans celebrate September 16 as Independence Day because this is the day that the movement towards independence began. Every year, late on September 15, Mexico's president rings a bell and repeats the Grito de Dolores.