May Day worldwide: Workers' rights and workers' fights
May Day 2016 marks 130 years since police shot at laborers, merchants and immigrant workers on Haymarket Square in Chicago. Police killed four people demanding an eight-hour workday during a three-day general strike.
Working hard for May Day
Workers in Bangladesh saw through logs to make a living so that they can support their families.
May Day in Rome
A man waves a flag with a portrait of the Argentine revolutionary Che Guevara during a concert to celebrate May Day in Rome's Piazza San Giovanni in 2014.
May Day in Russia
This banner reads, "Throw down the tandem" and depicts Putin as the Madonna holding his "child" (then-President Dmitry Medvedev) during the 2011 May Day rally in Moscow. During Soviet times, May Day celebrated the toils of the proletariat. Under Putin, crowds again gather in cities from the Pacific port of Vladivostok to Moscow for carefully choreographed rallies.
May Day in Ecuador
Supporters of the Ecuadoran opposition march in commemoration of May Day in Quito in 2015.
May Day in Germany
It's May Day's oldest mantra, this time on display in Bremen in 2009. Banners read: "Work for everybody, with fair wages."
May Day in Indonesia
Thousands of workers gathered in the capital, Jakarta, to demand better working conditions in 2015.
May Day in Italy
Youngsters attend a concert to celebrate May Day in Rome's Piazza San Giovanni in 2013.
May Day in El Salvador
Workers take part in the May Day parade organized by the Farabundo Marti National Liberation Front and various worker unions in San Salvador in 2014.
May Day in France
People attend the May Day demonstration a few days before the final round of the 2007 presidential elections. "Stop Sarko" the opposition, futilely that year, demanded, referring to then-President Nicolas Sarkozy.
May Day in Venezuela
An opponent of the Venezuelan government wears a Guy Fawkes mask during the 2014 May Day demonstration in Caracas. Opponents and supporters of the government of Venezuelan President Nicolas Maduro marched in Caracas to commemorate the Workers' Day.
May Day in Britain
Anti-capitalists wear makeshift body armor at the 2002 May Day demonstration in London. There were sporadic clashes with police throughout the day, but the demonstration was mostly peaceful.
May Day in Bangladesh
Activists from different organizations shout slogans and wave flags during the 2011 procession to mark May Day in the capital, Dhaka.
May Day in the United States
May Day is not even a holiday in the United States. Still, demonstrators marched in the 2014 May Day protest in Los Angeles. They were demanding immigration reform and better pay and working conditions.