By Michael Arria for AlterNet. Labor Day is regarded as “the unofficial end of summer” for many Americans, a time for one last cookout party and back-to-school discounts. Its history is all but forgotten but it remains crucial. The holiday was signed into law by President Grover Cleveland in 1894, days after members of the United States Army and the United States Marshall Service had killed 30 workers during the Pullman Strike. The legislation was something of an attempt to win hearts and minds: unions were justifiably skeptical of the government and the holiday was seen as a way to win some support. May 1st was floated out, but people already celebrated International Workers’ Day on that day, commemorating the workers killed during the Haymarket Affair. Cleveland thought celebrating Labor Day on May 1st would encourage more protests, strikes and riots. The first Monday of September was selected to avoid further unrest. This Labor Day is a particularly great opportunity to remember the holiday’s history as 2016 has featured some major victories for workers.