“Work, and the way it fits into one’s life, can be and often has been, less rigid and routinized than is common today. In modernized societies, work is organized around the clock, and most jobs are shoehorned into the same eight-hour schedule. In the past, and in some cultures still today, other factors–the seasons, the weather, tradition, the availability of light, the availability of labor–determine which tasks are done when.” – 3 Quarks Daily