Then, in October 1884, the Federation of Organized Trades and Labour Unions of the United States and Canada decided that May 1, 1886, would mark the first day that an eight-hour workday would go into effect.
But as the end of the workday approached, striking workers in Chicago attempted to confront strikebreakers at the McCormick Harvesting Machine Company.
In the Turkish city of Istanbul, protesters clashed with police while trying to reach the city's iconic Taksim Square.
Protests against the far-right Alternative for Germany (also known as AfD) party were held in several German cities.
He said the police were preparing by practising crowd control techniques and the formation of barriers.