May Day is workers' day
The struggle for the eight-hour day which began in the 19th century (and which goes on, even now) involved strikes and demonstrations throughout the world, and a coordinated day of action on 1 May 1886. In a related demonstration three days later, in the Haymarket in Chicago, a bomb was thrown at the police, killing eight. The anarchist organisers of the demonstration and the speakers were then arrested and prosecuted for the murders, on the grounds that the bomb…