May Revolution
The mutiny of Aranjuez in 1808 led King Charles IV of Spain to abdicate in favor of his son, Ferdinand VII. Charles IV requested that Napoleon restore him to the throne; instead, Napoleon crowned his own brother, Joseph Bonaparte, as the new Spanish King. These events are known as the Abdications of Bayonne. Joseph's coronation was met with severe resistance in Spain, which started the Peninsular War, and the Supreme Central Junta took power in the name of the absent king. This also led to Spain switching allegiances from France to Britain. France eventually invaded Sevilla, and a Council of Regency based in Cadiz replaced the disbanded Supreme Central Junta.
May Day riots of 1894
May Day, or International Workers' Day was a day for remembering the workers who died during the Haymarket affair of 1886. During a General Strike in Chicago, Illinois, an unknown person threw a bomb into the crowd, prompting police to fire into the crowd, killing civilians and police alike. The same day in 1890, Raymond Lavigne called for international demonstrations to commemorate the day. In 1894 the Pullman Strike in Illinois, as well as this series of unemployed workers' riots on May Day in Cleveland, prompted U.S. President Grover Cleveland to propose a bill that would make a Labor Day a national public holiday. After the Haymarket Square riot in May, 1886, US President Grover Cleveland 
feared that commemorating Labor Day on May 1 could become an opportunity to commemorate the riots. May Day celebrations have diminished in the United States, because of the creation of Labor Day.