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From strikes to new union contracts, Labor Day's organizing roots are especially strong this year

NEW YORK (AP) — Labor Day is right around the corner, along with the big sales and barbecues that come with it. But the activist roots of the holiday are especially visible this year as unions challenge how workers are treated — from Hollywood to the auto production lines of Detroit.

The early-September tribute to workers has been an official holiday for almost 130 years — but an emboldened labor movement has created an environment closer to the era from which Labor Day was born. Like the late 1800s, workers are facing rapid economic transformation — and a growing gap in pay between themselves and new billionaire leaders of industry, mirroring the stark inequalities seen more than a century ago.

“There’s a lot of historical rhyming between the period of the origins of Labor Day and today,” Todd Vachon, an assistant professor in the Rutgers School of Management and Labor Relations, told The Associated Press. “Then, they had the Carnegies and the Rockefellers. Today, we have the Musks and the Bezoses. ... It’s a similar period of transition and change and also of resistance — of working people wanting to have some kind of dignity."

Between writers and actors on strike, contentious contract negotiations that led up to a new labor deal for 340,000 unionized UPS workers and active picket lines across multiple industries, the labor in Labor Day is again at the forefront of the holiday arguably more than it has been in recent memory.

Here are some things to know about Labor Day this year.

WHEN WAS THE FIRST LABOR DAY OBSERVED?

The origins of Labor Day date back to the late 19th century, when activists first sought to establish a day that would pay tribute to workers.

The first U.S. Labor Day celebration took place in New York City on Sept. 5, 1882. Some 10,000 workers marched in a parade organized by the Central Labor Union and the Knights of Labor.

A handful of cities and states began to adopt laws recognizing Labor Day in the years that followed, yet it took more than a decade before President Grover Cleveland signed a congressional act in 1894 establishing the first Monday of September as a legal holiday.

Canada's Labour Day became official that same year, more than two decades after trade unions were legalized in the country.

The national holidays were established during a period of pivotal actions by organized labor. In the U.S., Vachon points to the Pullman Railroad Strike that began in May 1894, which effectively shut down rail traffic in much of the country.

“The federal government intervened to break the strike in a very violent way — that left more than a dozen workers dead,” Vachon says. Cleveland soon made Labor Day a national holiday in an attempt “to repair the trust of the workers.”