November 20th – Día de la Revolución – Day of the Revolution – 1910. This national (Statuary Holiday) is observed on the Third Monday of November.
The Mexican Revolution 1910 – 1920 – From Dictatorship to Constitutional Republic

Photo BigStockPhoto.com | PolaDamonte
Monument to the 1910 revolution, in the Republic Square Mexico DF

Monument to the Rrevolution

 The anniversary of the 1910 start of the popular movement (10-year revolution)  which led to the overthrow of dictator José de la Cruz Porfirio Díaz Mori after 34 years of military rule but ushered in over a decade of civil war which ultimately led to the promulgation of the nation’s constitution in 1917 and the 1920 ascension to the presidency of General Álvaro Obregón.

November 20 was the original public holiday date for Revolution Day until 2005. A change in Mexico’s labor law instituted that Revolution Day would be a public holiday across the country on the third Monday of November as of 2006.

Photo: Sculptures at the Monument to the Mexican Revolution (Monumento a la Revolución Mexicana). Built in Republic Square in Mexico City in 1936. Photo: BigStockPhoto.com | by demerzel21

The Mexican Revolution in a Nutshell by Emerson Kent
In 1911, Francisco I. Madero overthrew longtime Mexican dictator  Porfirio Díaz. Madero was not able to create stability and was himself ousted by counterrevolutionary general  Victoriano Huerta in 1913. Huerta’s regime only lasted until 1914, when Huerta was exiled. Venustiano Carranza emerged as the new leader, desperately trying to fight all other revolutionaries, i.e.  Francisco Pancho Villa and Emiliano Zapata, off his back.  Carranza was the new Mexican president in 1917 and got himself shot in 1920. Things finally calmed down a bit when  Álvaro Obregón became president in 1920.
Source: www.emersonkent.com/wars_and_battles_in_history/mexican_revolution.htm

Pancho Villa, Emiliano Zapata and others at the National Palace in Mexico City – December 6, 1914. With bandaged head to Zapata’s left: Otilio E. Montano. With hand on his belt to Montano’s left: Rodolfo Fierro. Photo: www.emersonkent.com

More photos and info about Pancho Villa
https://www.eventsloscabos.com/2014/01/francisco-pancho-villa/

A stamp dedicated to  Francisco Ignacio Madero Gonzalez a politician, writer and
revolutionary who served as President of Mexico from 1911 to 1913.
Photo circa 1985. bigstockphoto.com | markaumark

Francisco Ignacio Madero González
(30 de octubre de 1873 – 22 de febrero de 1913)
https://es.wikipedia.org/wiki/Francisco_I._Madero

Born in Coahuila on October 30, 1873. Son of a wealthy landowner. Family was devoted to ranching, farming and commerce. Studied commerce and economics in France and agriculture in the U.S. Saw the need to improve conditions in Mexico.

Gral. Venustiano Carranza, 1st Jefe Constitucionalista. With permission of “The John O. Hardman Collection”

Gral. Venustiano Carranza, 1st Jefe Constitucionalista
Born in 1859 as one of fifteen children of a wealthy landowner. Well educated. Entered politics as a municipal president. Later served as a state legislator, federal deputy and state governor under Diaz. Joined with Madero in 1909 to plan an armed rebellion against Diaz. Minister of war in Madero’s provisional government and later interim governor of Coahuila. Elected governor in December 1911. Assumed leadership of the rebellion against Huerta. Named First Chief of the Constitutionalists. Elected president in 1917. Tried to install a candidate favorable to him in the 1920 presidential election. Obregon, who was a candidate for president, rebelled. Carranza tried to flee to Vera Cruz. On May 20. 1920, he was killed as he slept in a small wooden hut in San Antonio Tlaxcalantongo.
Text and Photo Source: “The John O. Hardman Collection”