Things to know about labour day 

In late 1800s, many Americans working 12hrs a day six days or seven days a week

Even children, some as young as age five or six, were working in mines, mills and factories

ON may 4 1886 labour protesters and chicago police clased in the infamous haymarket riot, which become a symbol of struggle of worker's rights

Labour Day has its roots in the labour movement, which emerged in the late 19th century as workers began to organize and demand better working conditions, wages, and hours

Oregon was the first U.s state to declare labor day an offical holiday 

Today, May Day is an official holiday in 66 countries and unofficially celebrated in many more, but ironically it is rarely recognized in the country where it began, the United States of America.