Timeline Tuesday 4 May 1886

Events on Tuesday 4 May 1886 1

• 1886 Haymarket affair Bombing and riot during a Chicago labor rally A labor rally in support of striking workers at Chicago's Haymarket Square ended when a bomb was thrown at police, killing several officers and triggering gunfire that left both police and civilians dead. Eight anarchist labor activists were controversially tried and convicted, several sentenced to death, in a case that became a global symbol of the struggle for the eight-hour workday. The event helped establish May Day as an international workers' holiday.