People dancing around a maypole
Image credit: By KenL at English Wikipedia [Public domain], <a href="https://commons.wikimedia.org/wiki/File:New_York_RenFaire_2004_maypole.JPG">via Wikimedia Commons</a>

Since ancient times, the first of May has been celebrated as May Day in many European countries, a spring festival that involved the gathering of flowers and branches, and dancing around a May tree or Maypole. More recently, May Day has come to be associated with the international workers’ movement, as a day to advocate for labor rights, and to remember the Haymarket Riot that took place in Chicago on May 4, 1886.