How did the workweek develop

The modern workweek, where there are five days of work and a two-day weekend, developed in the early 20th century as a response to religious observance and worker needs as the Industrial Revolution had begun to affect all aspects of life. Although the origins of the week, and even concepts of a weekend, are very old, only over the last 100 years has there been a formal, set concept of a workweek and weekend in many countries.