The Anniversary of the First National Government (Spanish: Primer gobierno patrio) is a public holiday of Argentina, commemorating the May Revolution and the creation of the Primera Junta on May 25, 1810, which is considered the first patriotic government of Argentina.

Along with the 9 July, which commemorates the Declaration of Independence, it is considered a National Day of Argentina.

Commemorations of the May Revolution have been held since 1811, the first anniversary: Cornelio Saavedra ruled so for Buenos Aires, and Manuel Belgrano and Juan José Castelli did the same during their military campaigns at the cities they had under control during the anniversaries.

The celebrations in 1857, when Buenos Aires had temporary seceded from the Argentine Confederation, were large and included the remodelation of the Plaza.

By 1880, with the federalization of Buenos Aires, the local connotations were removed and the May Revolution was considered the birth of the nation.