May Day rallies and marches were held worldwide on May 1, 2017.
Here's how May Day rallies unfolded around the world
Some employers like Facebook began rolling out paid time off for social justice events like May Day.
Recommended articles
Some of the demonstrations, which are also celebrated under the reflected cultural traditions, and many others were a rallying cry for equal rights, equal pay, and a renewed focus on social, environmental and civil-rights issues.
Here are 12 photos from May Day marches worldwide.
Hamburg, Germany's march revolved around the upcoming G20 summit that the city is set to host in July.
Demonstrators clashed with police in Paris, where protestors shouted 'Fascists out!'.
In Berlin, riot police kept a close eye on May Day rallies.
Thousands of protesters march down Market Street during a May Day demonstration San Francisco, California.
The Glastonbury Dragons were paraded through the town as part of the Glastonbury Dragon's May Fayre, which is part of the town's Beltane and May Day celebrations by druids and pagans as the beginning of summer and the chance to celebrate the coming of the season of warmth and light.
Sanctuary cities and immigration was a key theme at the May Day rally in Los Angeles, California.
Protestors clashed with police in Istanbul, who used tear gas and water cannons to disperse protesters throughout the day in various neighborhoods.
Hundreds of people gathered in Union Square for May Day protests in New York City.
Demonstrators clashed with riot police during a May Day rally in Santiago, Chile.
Laborers and political workers took part in a rally demanding reasonable wages and workers' safety in Peshawar, Pakistan.
People held flags as they took part in a May Day rally in rebel-held Luhansk, Ukraine.
Workers from the Korean Confederation of Trade Unions (KCTU) held red-colored umbrellas during a May Day rally in Seoul, South Korea.