Factory employees worked days a week.

Factory employees worked 6 days a week.

In the 1800s, people in manufacturing area used to work about a hundred hours per week: between ten and sixteen hour shifts over six-day workweeks. Labor unions were the most important early supporters of the eight-hour workday in the United States.  Ford's employees used to be working forty-eight hours a week: eight-hour days and six-day weeks.

it is a part of john locke's natural rights popular during the age of enlightenment that people had inalienable rights to life, liberty and property. this was reflected by thomas jefferson in his declaration of independence as rights to life,liberty and the pursuit of happiness.

another line in the declaration of independence is that people have certain rights just because they are human. humans are capable of obeying the three natural rights john locke mentioned making them governable by these laws and therefore entitled to these rights as well.