Mexican War of Independence
Although Mexico gained its independence in September 1821, the marking of this historical event did not take hold immediately. The choice of date to celebrate was problematic, because Iturbide, who achieved independence from Spain, was rapidly created Emperor of Mexico. His short-lived reign from 1821–22 ended when he was forced by the military to abdicate. This was a rocky start for the new nation, which made celebrating independence on the anniversary of Iturbide's Army of the Three Guarantees marching into Mexico City in triumph a less than perfect day for those who had opposed him. Celebrations of independence during his reign were marked on September 27. Following his ouster, there were calls to commemorate Mexican independence along the lines that the United States celebrated in grand style its Independence Day on July 4. The creation of a committee of powerful men to mark independence celebrations, the "Junta Patriótica", organized celebrations of both September 16, to commemorate Hidalgo's grito and the start of the independence insurgency, and September 27, to celebrate actual political independence.
History of Mexico City
In 1910, Mexico celebrated the 1810 Hidalgo revolt that initiated the independence movement in Mexico. Díaz had been in power since 1876 and saw the occasion of the centenary as an opportunity for the creation of new buildings and monuments and to invite world dignitaries to show off Mexico's progress. For buildings, much advance planning and other work was needed to have them completed in time for September 1910. During that month in Mexico City, there were "inaugurations of a new modern mental hospital, a popular hygiene exhibition, an exhibition of Spanish art and industry, exhibitions of Japanese products and avant-garde Mexican art, a monument to Alexander von Humboldt at the National Library, a seismological station, a new theater in the Escuela Nacional Preparatoria, primary schools, new buildings for ministries, and new large schools for teachers." On the actual anniversary of Hidalgo's "grito", 16 September, Díaz inaugurated the monument to Independence, "the Angel".