On 4th May 1886, in the city of Chicago, workers were demonstrating to make working days last only up to 8 hours. Amongst them, someone threw a bomb (the first dynamite bomb in the USA) and the police thought it was a reaction to them -they were trying to dissolve the demonstration- and started shooting to the strikers. This was called the Haymarket Affair, Massacre or Riot.
For this affair, eight anarchists were blamed and sentenced for conspiration, this was understood as an attack to the working movement. The trial was soon argued because some of the accused were not even at the place!!
As a commemoration of this strike and other movements organized among others by Lucy and Albert Parsons, the 1st May is the day to ask for better working conditions in many parts of the world and it is even a holiday in many countries. In USA and Canada is widely celebrated in September.
Did you know this?