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May Day participants around the world marked the holiday in both celebration and in protest, calling for better working conditions, wages and rights.
Participants wave communist flags near a statue of Soviet leader Vladimir Lenin during an International Worker's Day, or Labor Day, parade in Donetsk, east Ukraine on May 1.
Turkish protesters wearing gas masks hold a banner reading "Workers Who Resist Win" as they march towards Taksim Square in Istanbul during a May Day rally on Thursday. Turkish police used water cannons and tear gas to disperse thousands of protesters who tried to defy a Labor Day ban on demonstrations in Istanbul's Taksim Square, the scene of protests that have dogged the government for months.
An elderly couple dances as local citizens gather to mark May Day in Slovyansk, eastern Ukraine.
Leicester Morris Men play an accordion and dance at Bradgate Park in Newtown Linford, central England. The May Day Morris celebration is a traditional rite thought to be connected to changing seasons and fertility.
Indonesian migrant workers chant slogans and carry placards during a Labor Day rally in Hong Kong. Over a thousand protesters walked to the government headquarters calling for better working conditions, better wages and equal rights.
Activists from the Indian Federation of Trade Unions, Communist trade union workers and factory workers shout slogans against state and central government policies that they say negatively impact workers during a protest on International Labor Day in New Delhi.
People march in a May Day parade in Havana, Cuba.
Steel workers in red hats and high-visibility vests march in a May Day demonstration in central Athens. More than 15,000 protesters attended the peaceful rallies in Athens, with demonstrations aimed at ongoing austerity measures in the crisis-hit country that have caused a dramatic rise in poverty and unemployment.
A member of Sri Lanka's Marxist Party Peoples Liberation Front carries a flag symbolizing the working class during a May Day parade in Colombo, Sri Lanka.
Workers protest during a rally marking Labor Day in Taipei, Taiwan. The rally was held to demand higher pay, less work hours and oppose a China trade pact which they fear will hurt Taiwan's economy.
South Korean workers and union activists shout slogans while holding up placards reading "We don't need this kind of president!" during a May Day rally in Seoul. The rally drew around 5,000 people who denounced President Park Geun-Hye and urged her to take reponsibility for the government's "bungled and incompetent" response to the Sewol ferry disaster that claimed the lives of hundreds of schoolchildren.
Soldiers parade with representations of Cuba's national flag in the May Day march in Havana, Cuba. Cuba marks each May Day not with protests but with massive marches organized by workplaces, schools and government. Thousands of islanders filed through Havana's Revolution Plaza on Thursday to a soundtrack of congas, drums and cries of "Long live the revolution!"