8-hour day

The eight-hour day movement or 40-hour week movement, also known as the short-time movement, was a social movement to regulate the length of a working day, preventing excesses and abuses. It was started by James Deb and had its origins in the Industrial Revolution in Britain, where industrial production in large factories transformed working life. The use of child labour was common. The working day could range from 10 to 16 hours, and the work week was typically six days a week.

Robert Owen had raised the demand for a ten-hour day in 1810, and instituted it in his socialist enterprise at New Lanark. By 1817 he had formulated the goal of the eight-hour day and coined the slogan: "Eight hours' labour, Eight hours' recreation, Eight hours' rest". Women and children in England were granted the ten-hour day in 1847. French workers won the 12-hour day after the February Revolution of 1848. A shorter working day and improved working conditions were part of the general protests and agitation for Chartist reforms and the early organisation of trade unions.

The International Workingmen's Association took up the demand for an eight-hour day at its Congress in Geneva in 1866, declaring "The legal limitation of the working day is a preliminary condition without which all further attempts at improvements and emancipation of the working class must prove abortive", and "The Congress proposes eight hours as the legal limit of the working day."

Karl Marx saw it as of vital importance to the workers' health, writing in Das Kapital (1867): "By extending the working day, therefore, capitalist production...not only produces a deterioration of human labour power by robbing it of its normal moral and physical conditions of development and activity, but also produces the premature exhaustion and death of this labour power itself."

...
Wikipedia