Labor Day poster template.International Workers' Day celebration with Yellow safety hard hat and construction tools.Sale promotion advertising Poster or Banner for Labor Day

Unique May Day finds from our Signature collection

iStock’s ever-growing Signature collection features millions of authentic images—including these awe-inspiring May Day illustrations—that you won’t find on any other stock site.

Labor Day Hand Holding Wrench

Celebrating the International Labor Day in 1st May with hand holding wrench on gear wheels background showing the right of labor

Happy Labor Day

Celebrating the International Labor Day in 1st May with paper craft of people holding hammer, wrench, grip piler, screwdriver and axe on the blue ground

Rioting and Bloodshed in the Streets of Chicago, 1886

Vintage engraving features a scene where a police patrol-wagon is attacked by a mob of 12,000 rioters in Chicago, Illinois in May 1886. This riot, known as the Haymarket Square Riot, began as a peaceful rally in support of workers striking for an eight-hour work day, until a bomb exploded, causing the riot. The bomb was allegedly built and exploded by anarchists. The Haymarket Affair is generally considered significant as the origin of International Workers' Day held on May 1st (May Day.)

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