Monday to Friday. Five days on, two days off. It structures nearly every working adult’s life on the planet. But this pattern is barely a century old, and the story of how it became universal is stranger than you might expect.
The Factory Clock
Before industrialisation, most people didn’t have “work weeks” at all. Agricultural workers followed seasons. Artisans worked when there was work. The concept of fixed, standardised working days is an invention of the factory system.
Early factories ran six days a week, sometimes seven. Workers pushed back — not for weekends as we know them, but for religious observance. Jewish workers needed Saturday. Christian workers expected Sunday.
Henry Ford’s Experiment
In 1926, Henry Ford standardised the five-day, 40-hour work week at Ford Motor Company. The popular narrative frames this as benevolent — Ford caring about his workers’ wellbeing.
The reality is more interesting. Ford discovered that workers with more rest were more productive. And workers with free time bought more things. The weekend wasn’t a gift — it was a market expansion strategy.
As Ford himself noted: workers needed time to consume the products they were making.
The Question Nobody Asks
If the five-day work week was designed for factory productivity and consumer spending, why does it still govern knowledge work, creative work, and service work — none of which follow factory logic?
Multiple studies suggest that productivity in knowledge work peaks at around 25-30 hours per week. Beyond that, quality declines. Yet the 40-hour week persists, defended not by evidence but by inertia and cultural expectation.
Who benefits from maintaining a work structure designed for a century-old economic model? What would change if we questioned it as seriously as Ford questioned the six-day week?
The five-day work week is not a law of nature. It is a decision someone made. Decisions can be unmade.