Many American workers live for their weekends. This is the time that they spend with their families, catch up on errands, and just relax. The practice of taking a day of rest is a centuries-old concept. In the pre-industrial era, workers would typically have off one day per week to observe the Sabbath. In agrarian settings, people worked as much as they needed to survive, hunting, gathering, and farming—probably averaging less than 40 hours per week. This pattern changed in the 18th century with the Industrial Revolution….