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 International Astronomical Union has established a committee to finalize a list of official star names. Some companies offer unofficial naming rights for purchase. But the voices of certain communities are often left behind.