In 1889, the International Socialist Conference declared May 1st an international holiday for labor in commemoration of the 1886 Haymarket affair, where police killed at least eight workers at a Chicago labor demonstration. The first of May is a public holiday in 66 countries and is unofficially celebrated in many more.
Though often associated with workers' rights, May Day also serves as a platform for fringes of the political spectrum to self-advocate—today in Germany, leftists and anarchists march in Berlin and neo-Nazis march in Erfurt.
The May Day "King" and "Queen" lead the Greenmen of Glastonbury carrying this year's Maypole through the center of Glastonbury, to a ceremony at Bushy Combe below Glastonbury Tor as part of the town's Beltane May Day celebrations on May 1st, 2018, in Somerset, England.
Boeing workers in Washington State have been unionized for decades; their counterparts in South Carolina recently voted out the union in a landslide. Pacific Standard compares conditions in both workplaces, a year after South Carolina's historic vote.