A protester holds a sign with a hammer and a sickle symbolising the Soviet Union during a May Day (Labour Day) rally, marking International Workers' Day, in the Kadikoy district of Istanbul, on May 1, 2026. At least 370 people were arrested Friday in May 1 demonstrations in Istanbul curbed by a heavy police deployment, a lawyers' association present at the rallies said. (Photo by Ozan KOSE / AFP via Getty Images)

French trade union General Confederation of Labour (CGT) secretary general Sophie Binet (C) takes part in a May Day rally marking International Workers' Day in Paris, on May 1, 2026. (Photo by Julie SEBADELHA / AFP via Getty Images)

People march during a May Day rally marking International Workers' Day in Paris, on May 1, 2026. (Photo by Julie SEBADELHA / AFP via Getty Images)

This photo taken and handout on May 1, 2026 by the Vigili del Fuoco, the Italian Corps. of Firefighters, shows firefighters trying to extinguish a major fire on Mount Faeta in the area between the provinces of Lucca and Pisa in the Tuscany region. (Photo by HANDOUT / Vigili del Fuoco / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / Vigili del Fuoco" - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

French Democratic Confederation of Labour (CFDT) trade union's general secretary Marylise Leon takes part in a May Day rally marking International Workers' Day in Paris, on May 1, 2026. (Photo by Julie SEBADELHA / AFP via Getty Images)

French Democratic Confederation of Labour (CFDT) trade union's general secretary Marylise Leon (L) and French trade union General Confederation of Labour (CGT) secretary general Sophie Binet (2ndR) march during a May Day rally marking International Workers' Day in Paris, on May 1, 2026. (Photo by Julie SEBADELHA / AFP via Getty Images)

La France Insoumise (LFI) leader Jean-Luc Melenchon delivers a speech during a gathering at Place de la Republique as part of a May Day rally marking International Workers' Day in Paris, on May 1, 2026. (Photo by Julie SEBADELHA / AFP via Getty Images)

French Democratic Confederation of Labour (CFDT) trade union's general secretary Marylise Leon takes part in a May Day rally marking International Workers' Day in Paris, on May 1, 2026. (Photo by Julie SEBADELHA / AFP via Getty Images)